A person who lives in a city with high air pollution levels may be exposed to increased oxidative damage in the lungs from breathing the contaminated air. The antioxidant vitamin needed to protect the cells from damage is vitamin E.
Vitamin E is a fat-soluble vitamin that has potent antioxidant properties. It works by neutralizing free radicals, which are unstable molecules that can damage cells and contribute to the development of various diseases. Air pollution is known to generate free radicals in the lungs, leading to oxidative stress and damage to lung tissue.
Vitamin E can help protect the lungs by scavenging free radicals and reducing oxidative damage. It has been shown to reduce the risk of developing lung diseases, such as asthma and chronic obstructive pulmonary disease (COPD), in people who are exposed to air pollution.
While vitamins K and D also play important roles in maintaining health, they do not have the same antioxidant properties as vitamin E and are not as effective in protecting against oxidative damage caused by air pollution.
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two different species of butterfly were forced into the same habitat due to urban development. the adults were equally effective at feeding on nectar from several kinds of flowers. however, both species of caterpillar larva ate the same type of milkweed, and one species ate faster than the others. one of the adult species is likely to become extinct because
Due to the presence of a limited food resource (milkweed) for caterpillar larva and competition from the other species of butterfly, the species with slower eating is likely to become extinct.
This is because it has less of an advantage in gaining access to the limited food resource and therefore has less of a chance of surviving. In the given scenario, it is observed that two different species of butterfly are forced to share the same habitat. They both have distinct differences in terms of their larvae stage, but they both are similarly good at feeding on the nectar from flowers. It has been found that both species of caterpillar larva eat the same type of milkweed, but one species eats faster than the others.
Based on this, it can be concluded that one of the adult species is likely to become extinct. The species that is likely to become extinct will be the one with the slower eating larva. This is because the faster-eating larva will feed on most of the available milkweed, leaving little or no food for the slower-eating larvae.
The slower-eating larvae will have less access to food and are likely to die before becoming an adult butterfly. Therefore, the adult butterfly species with the slower-eating larvae will become extinct.
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How can a geological features that occur at plate boundaries be used to determine which direction plates are moving
Mapping narrow belts of earthquakes, volcanoes, and young mountain ranges helps define and identify plate borders.
What kind of geologic structure causes a plate border to move?We refer to a diverging plate boundary as two plates that are moving apart. Magma rises from the interior of the Earth and erupts at these borders, creating new lithosphere crust. Oceanic spreading ridges are submerged mountain ranges formed by diverging plate borders, which are the majority of them.Three different types of tectonic boundaries are produced by the movement of the plates: convergent boundaries, where plates move toward one another; divergent boundaries, where plates move apart; and transform boundaries, where plates move laterally with respect to one another. Between one and two inches every second (three to five centimeters).For more information on plate boundaries direction kindly visit to
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the rate at which materials enter and leave the cell depends on the cells
Answer: the answer is the surface area
Explanation: The increase in the radius of the cell will cause an increase in the area of the cell.
The larger the area of the cells, the faster will be the rate of diffusion. The rate at which materials are exchanged will be increased.
The increase in the cell size, however, causes a decrease in the area-to-volume ratio, which will result in efficient diffusion.
Thus, the surface area of the cell and its volume play a crucial role in the exchange of material with the surrounding.
which is true of heterotrophs? group of answer choices they store energy in the form of heat. they can obtain energy by consuming phototrophs. they cannot be unicellular. they capture light energy. they can function as autotrophs in an emergency.
Heterotrophs can obtain energy by consuming phototrophs is true.
Heterotrophs are organisms that are unable to make their own food from simple inorganic substances, and they must acquire organic compounds such as carbohydrates, proteins, and lipids from other organisms, living or dead. They are unable to produce their own food, so they depend on other organisms to obtain the energy and nutrients they require.
Heterotrophs can be classified into three categories: holozoic, saprophytic, and parasitic, depending on how they obtain their food. Holozoic heterotrophs feed on living organisms, while saprophytic heterotrophs consume dead organic material, and parasitic heterotrophs live on the host's body and take their nourishment from it.
Phototrophs are autotrophic organisms that utilize light energy to produce organic compounds like carbohydrates, proteins, and lipids, making them producers in the food chain. Examples of phototrophs include green plants, algae, and some bacteria.
They use sunlight to power the photosynthesis process, which transforms inorganic compounds into organic compounds for their own use. Therefore, the statement "Heterotrophs can obtain energy by consuming phototrophs" is true of heterotrophs.
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which of the following are all energy containing nutrients? select an answer and submit. for keyboard navigation, use the up/down arrow keys to select an answer. a carbohydrates, fats, proteins b minerals, protein, fat c water, fat, carbohydrates d vitamins, fat, alcohol e carbohydrates, fats, protein, minerals, vitamins, and water
Carbohydrates, fats, and proteins are all energy-containing nutrients. Option A is correct.
Carbohydrates, fats, and proteins are the three macronutrients that provide energy to the body. Carbohydrates are the primary source of energy, while fats and proteins are used as secondary sources of energy. These nutrients are broken down by the body into smaller molecules, which are then used by cells to produce ATP, the energy currency of the body.
Minerals, vitamins, and water are also essential nutrients for the body, but they do not contain energy. Alcohol is not considered a nutrient, but it does provide energy when consumed in moderate amounts. Therefore Option A is correct.
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in which habitat should one find snapping shrimp most closely related to shrimp that live in habitat a4?
The habitat should one find snapping shrimp most closely related to shrimp that live in habitat A4.
The snapping shrimp should be most closely related to shrimp that live in habitat A4, which is described as having lots of algae and plant life but no coral or seaweed. The reason why is that snapping shrimp are found in a variety of marine environments, but they typically prefer shallow-water habitats that have lots of structure and plenty of hiding places.
Algae and plant life provide the ideal conditions for snapping shrimp because they can easily burrow into the sand or mud and create a safe haven where they can rest and hide from predators. Coral and seaweed may provide some structure, but they do not offer the same level of protection as algae and plant life. Therefore, the snapping shrimp should be most closely related to shrimp that live in habitat A4.
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which event occurs when myocardial oxygen demand exceeds oxygen supply?
When myocardial oxygen demand exceeds oxygen supply, it leads to myocardial ischemia, a condition where the heart muscle doesn't receive enough blood and oxygen.
This is typically caused by a narrowing or blockage of the coronary arteries, which are responsible for delivering blood to the heart. Myocardial ischemia can cause chest pain or discomfort, known as angina, which is a common symptom of coronary artery disease.
If the blood flow to the heart muscle is not restored promptly, it can result in a heart attack, where the affected portion of the heart muscle dies due to lack of oxygen and nutrients.
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PLEASE HELP ASAP!!!
You and a friend are debating the pros and cons of cooking in a convection oven or
using the heat from a fireplace. Compare and contrast the movement of heat in the
convection oven and a fireplace and identify the kind of heat transfer occurring in
both systems.
Answer:
Explanation:
In a convection oven, heat transfer occurs through convection, which is a more efficient method of heat transfer because it adds the element of motion. A convection oven has a fan that blows hot air around, which heats food faster than an ordinary oven 1.
In a fireplace, heat transfer occurs through conduction, convection, and radiation. Radiation is responsible for most of the heat transferred into the room while conduction transfers heat into the room at a much slower rate 2.
Alternate response
A convection oven and a fireplace both generate heat, but they operate in different ways and transfer heat differently.
A convection oven circulates hot air using fans, which creates an even temperature throughout the oven. The hot air surrounds the food, cooking it from all sides, and the circulating air helps to transfer heat more efficiently. The heat transfer that occurs in a convection oven is convection, which is the transfer of heat through the movement of fluids or gases. In this case, the fluid is the hot air.
On the other hand, a fireplace radiates heat outward from its flames and embers. As the fire burns, it emits infrared radiation, which heats up the objects and surfaces in the room, including people. The heat transfer that occurs in a fireplace is primarily radiation, which is the transfer of heat through electromagnetic waves. Some convection also occurs as the hot air rises from the fire, creating a flow of hot air that can circulate throughout the room.
In terms of pros and cons, a convection oven offers more precise temperature control and even heating, making it ideal for baking and roasting. However, it may not provide the same smoky flavor and texture that a fireplace can offer, especially for grilling or smoking meats. A fireplace is great for creating a cozy and warm atmosphere, but it can be difficult to control the heat output and may not be as efficient for cooking.
In summary, while both a convection oven and a fireplace generate heat, they operate differently and transfer heat through different methods. The convection oven relies on circulating hot air, while the fireplace radiates heat through infrared radiation and also has some convection. The heat transfer occurring in a convection oven is convection, and in a fireplace, it is primarily radiation. Each has its pros and cons, depending on the cooking task at hand.
whereas food chains show linear energy transfer between organisms, food webs depict more realistically what occurs in an ecosystem. true or false?
Answer:
True
Explanation:
:)
Which of the following represents a
population?
Aunt, Uncle, Cousin
mom
Water, Fish, Dog, Cat
Mom, Dad, Brother, Sister, Dog
In terms of statistics, the term "population" refers to a collection of people, things, or occasions that the researcher is interested in and that have something in common.
Of of the available choices, "Mom, Dad, Brother, Sister, Dog" symbolizes a population since it is a collection of people who are related to one another and reside in the same home.
Whereas "Water, Fish, Dog, Cat" indicates a group of objects that do not share any characteristics in common and cannot be regarded as a population in a statistical sense, "Aunt, Uncle, Cousin," and "Mum" represent persons.
Who or what defines a population?a group of people from the same species living together as a community. Density, sex ratio, birth and death rates, emigration, and immigration are some of the variables that affect a population's makeup.
What are the population's influencing factors?Demographers often concentrate on four key variables when attempting to predict changes in population size: fertility rates, death rates (life expectancy), the beginning age profile of the population (whether it is relatively elderly or young, to begin with), and migration.
What are the three terms for the population?Population pyramids can be expanding, constrictive, or stable.
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the liquid portion of blood is called and makes up about (percentage) of the total blood volume:
the cattle egret is a large north american bird that commonly sits on the backs of grazing cattle and eats insects, including pests to cows, that pester the cattle. this is an example of
specifically, commensalism in symbiosis.
One organism benefits from commensalism, a sort of symbiotic connection in which the other is neither assisted nor injured.
In this instance, the cattle egret reaps the rewards by eating the insects that annoy the cattle, with no negative effects on the cattle. As a result, the connection is commensalism.
CommensalismAn example of a symbiotic relationship between two species is commensalism, in which one species gains while the other neither suffers nor gains from the interaction.
In this situation, the cattle egret gains access to a convenient food source (insects that annoy the cattle) without having to exert much effort to obtain them. Contrarily, the egret's presence has no negative or positive effects on the cattle.
Neither does the cattle egret directly benefit the livestock nor does it do any harm to them. However, the egret indirectly assists the cattle by lowering the number of pests around by eating insects that annoy the cattle.
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an unknown mineral breaks along smooth planes when hit with a hammer. which mineral property does this show?Streak fracture cleavage luster
When a mineral is sharply struck with a hammer, cleavage, a feature of the material, causes the mineral to break cleanly along particular internal planes (known as cleavage planes).
Does a material have the capacity to fracture when struck along particular planes?If the mineral is hit with a hard object in this situation, it will typically break along these planes. The term "cleavage" refers to this ability to split along particular planes. due to the crystal lattice's cleavage occurring along planes.
Which kind of a property is cleavage?An object's ability to be divided into two main portions or smaller bits is known as cleavage. Solids have the ability to be divided into straightforward parts.
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How does volcanic activity affect climate?
Gas and ash filter out solar radiation, causing the temperature to BLANK (Answer:Decrease)
Water vapor and carbon dioxide are released into the atmosphere, causing the climate to get BLANK (Answer:Warmer)
The temperature falls as a result of the sun's energy being filtered out by gas and ash. Climate change is brought on by the discharge of water vapour and carbon dioxide into the atmosphere.
What effect do gas and ash have on the sun radiation that raises temperature?The existence of gases and ash in the atmosphere lowered the temperature in the troposphere and decreased the amount of solar radiation that reached the Earth's surface.
What do they refer to as gases when they raise the amount of solar heat radiation in the atmosphere?Unlike other gas molecules in the atmosphere, greenhouse gases have a more complicated structure that can absorb heat. They either return the, another greenhouse gas molecule, or the surface of the Earth.
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What type of evolution is vestigial structures?
Vestigial structures are often cited as evidence of evolutionary history and are the result of a type of evolution known as "evolutionary remnants" or "vestigial evolution". Vestigial structures are the type of evolution that refers to the presence of body parts in an organism that has no use, although they may have been used by the ancestors of the organism.
Vestigial structures are the evolutionary remnants of an organism's ancestors, which lost their original function through evolution. Such structures are the result of an evolutionary process called verticalization, which occurs due to changes in the environment, lifestyle, or genetic composition of an organism. They have been preserved in the genome of the organism, despite the fact that they no longer serve a purpose, due to their position in the genome, their low metabolic cost, and the lack of selective pressures to eliminate them.
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if the m checkpoint is not cleared, what stage of mitosis will be blocked?
If the M checkpoint is not cleared, the cell will be blocked in metaphase stage of mitosis.
The M checkpoint or spindle checkpoint is a phase of mitosis where the cell verifies that all of the chromosomes have been replicated and that they are correctly attached to the spindle fibers. Mitosis is the process by which cells divide and replicate. This process is a key step in a range of different functions, including the development of new cells, tissue repair, and growth, and is also necessary for the replication of organisms.
There are four phases of mitosis: prophase, metaphase, anaphase, and telophase. Each of these phases is characterized by different stages of cell division, and each is necessary for the process to be successful.The M checkpoint occurs in the middle of mitosis, and ensures that chromosomes have properly replicated and are correctly aligned on the spindle fibers. If this checkpoint is not cleared, the cell will be unable to progress to anaphase, and will remain in metaphase until the issue is resolved.
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he sequence of the pcr product obtained in the his pcr amplification reaction (used for yeast transformation) differs from the sequence contained within the original fa6 plasmid used as the template in the pcr reaction. what is this difference and why is it important for the success of the rad1 knockout experiment
The difference between the sequence of the PCR product obtained in the HIS PCR amplification reaction and the sequence contained within the original FA6 plasmid used as the template in the PCR reaction is that the former has a RAD1 deletion whereas the latter does not.
This difference is important for the success of the RAD1 knockout experiment because the RAD1 gene is being replaced by the HIS gene through a process known as gene targeting.
The RAD1 gene, on the other hand, is the recipient of the replacement. In the PCR amplification reaction, primers are used to amplify the HIS gene along with a sequence from RAD1 to provide the recombination substrate.
As a result, the sequence between the HIS and RAD1 regions is deleted, leaving only the HIS gene sequence flanked by the RAD1 sequences.
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since
Which animal is a vertebrate?
shrimp
octopus
crab
fish
Fish!
A vertebrate is a creature that has a spine, an invertebrate is a creature without a spine. If you look up fish you will see they have spines! May God bless you!
Do you think that scientists need to be concerned about global warming impacting the polar ecosystems? Why or Why not? Use facts and your personal opinion to support your answer. You may use the internet to gather additional research but cite properl
if the petals of a flower are reduced or absent how is it pollinated
Answer: the flower will rely on wind or water
Explanation: the petals of a flower have color and sent to attract insects for pollination. But if the pedals of the flour are absent then the plant will rely on the wind or water for pollination.
Why is fermentation a required pathway for providing cellular energy when oxygen is unavailable or in insufficient supply?
- NAD is not regenerated by the electron transport chain. - ATP production requires oxygen.
- NADH cannot be reduced to NAD+
- Cells need either lactic acid or ethanol when oxygen is low
- Lactic acid or ethanol can be used to generate oxygen.
Fermentation is a required pathway for providing cellular energy when oxygen is unavailable or in insufficient supply due to the fact that ATP production requires oxygen.
Fermentation refers to the process by which organisms break down carbohydrates in the absence of oxygen, which is known as anaerobic respiration. This process is also known as cellular respiration, which is the process by which cells generate energy by breaking down food molecules.
Fermentation is a way for cells to make ATP without using oxygen. Fermentation results in the conversion of NADH to NAD+, allowing the glycolytic pathway to continue and ATP to be produced. Glycolysis, on the other hand, only generates a small amount of ATP, which is why fermentation is required. Lactic acid or ethanol can be used to generate oxygen is a false statement.
NAD is not regenerated by the electron transport chain and NADH cannot be reduced to NAD+ under anaerobic conditions. Cells need either lactic acid or ethanol when oxygen is low in order to generate ATP. Therefore, the answer is cells need either lactic acid or ethanol when oxygen is low.
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what should the vascular technologist be on the lookout for around tortuous vessels to prove whether increased velocities around the tortuosity are from true stenosis or from the tortuosity?
As a vascular technologist, when evaluating vessels, you should be on the lookout for the following to differentiate between true stenosis and tortuosity-related increased velocities:
Look for asymmetry: In the case of true stenosis, the area of narrowing will create an asymmetrical shape in the vessel. In contrast, in tortuous vessels, the velocity will be increased symmetrically throughout the tortuous segment.
Evaluate the angle of the tortuosity: A sharp angle (greater than 45 degrees) in a tortuous segment can cause increased velocities. Thus, the angle of the tortuosity should be measured to help determine whether increased velocities are due to stenosis or tortuosity.
Evaluate the length of the tortuosity: A long tortuous segment can cause increased velocities. Therefore, measuring the length of the tortuous segment can help differentiate between stenosis and tortuosity-related increased velocities.
Assess for other signs of stenosis: Look for other signs of stenosis such as turbulence or post-stenotic turbulence in the distal vessel.
It's important to note that these factors are interrelated and must be considered in context with the patient's clinical history and physical exam.
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List and correctly order the events that take place during translation and protein synthesis.
The events that take place during translation and protein synthesis are as follows: initiation, elongation, termination, and post-translational modification.
Translation is the process of protein synthesis, which converts the information in RNA molecules into amino acid sequences in protein molecules. Translation occurs in the ribosome, and it includes several steps, which are:
1. Initiation: It occurs when a messenger RNA molecule (mRNA) binds to the small subunit of the ribosome. Then, the ribosome scans the mRNA molecule to find the start codon (AUG), which indicates the beginning of the coding sequence.
2. Elongation: Once the start codon has been located, the ribosome adds amino acids to the growing polypeptide chain. This step includes three sub-steps, which are: codon recognition, peptide bond formation, and translocation.
3. Termination: It occurs when the ribosome reaches one of the three stop codons (UAG, UAA, or UGA), which do not code for an amino acid. The stop codon causes the release of the polypeptide chain and the mRNA molecule from the ribosome.
4. Post-Translational Modification: Finally, the newly synthesized polypeptide chain may undergo post-translational modifications, such as folding, cleavage, and addition of cofactors.
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what is the cause of peptic ulcer disease? question 20 options: hereditary hormonal imbalances with high gastrin levels breaks in the mucosa and presence of corrosive secretions decreased vagal activity and vascular engorgement gastric erosions related to high ammonia levels and
The cause of peptic ulcer disease is the presence of breaks in the mucosa and corrosive secretions.Peptic ulcer disease (PUD) is caused by the presence of breaks in the mucosa and corrosive secretions.
Peptic ulcer disease (PUD) is characterized by an imbalance in the protective and aggressive factors that damage the mucosal lining of the esophagus, stomach, or duodenum.
Factors such as hydrochloric acid and pepsinogen, which are produced in the stomach, can corrode the mucosal lining when they are not adequately regulated by protective factors such as bicarbonate, mucus, and prostaglandins.In addition to this, the bacterium Helicobacter pylori is also a major factor contributing to PUD.
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rough projection that supports body weight when sitting is called?
The rough projection that supports body weight when sitting is called is the ischial tuberosity.
What is the ischial tuberosity?The ischial tuberosity is a vital structure in the pelvic region. It's a bony landmark that's easy to spot, and it's the component that makes up the lowest portion of the pelvis. When seated, this bony area supports the weight of the body. It's likewise an attachment point for various muscles that work to move the legs and hips.
The ischial tuberosity is also known as the "sitting bone." It's an essential part of the body's posture mechanism since it provides a solid base for sitting, and it helps distribute weight evenly throughout the pelvis. Additionally, it connects the pelvic muscles to the lower limbs. The sacrotuberous ligament is also attached to this bone.
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Which of the following represents the correct sequence of the origin and conduction of action potential?
A. SA node → AV node → Bundle of His → Purkinje fibers
B. AV node → SA node → Bundle of His → Purkinje fibers
C. SA node → AV node → Purkinje fibers → Bundle of His
D. Bundle of His → Purkinje fibers → SA node → AV node
The correct sequence of the origin and conduction of action potential is A. SA node → AV node → Bundle of His → Purkinje fibers.
The action potential originates in the sinoatrial (SA) node, located in the upper wall of the right atrium of the heart. The electrical impulse travels to the atrioventricular (AV) node, located between the right atrium and the right ventricle. From there, the impulse moves to the Bundle of His, which is located in the interventricular septum. The Bundle of His divides into two branches, the left bundle branch, and the right bundle branch. Finally, the electrical impulse is conducted through the Purkinje fibers, which extend from the Bundle of His to the left and right ventricles.
In summary, the correct sequence of the origin and conduction of action potential is SA node → AV node → Bundle of His → Purkinje fibers. Therefore the correct option is A
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which three properties apply to green fluorescent protein? multiple select question. from the fluorescent mushroom mycena chlorophos easily cloned and expressed in any organism encoded in a two gene operon from the jellyfish aequorea victoria easily cloned but can only fluoresce in bacteria encoded by a single gene
Easily cloned ; Encoded in a two-gene operon ; Fluorescent (except for the GFP variant from jellyfish Aequorea Victoria that can only fluoresce in bacteria).
What is green fluorescent protein?The protein that shows bright green fluorescence when exposed to light in blue to ultraviolet range is called as green fluorescent protein.
The three properties that apply to Green Fluorescent Protein (GFP) are:
Easily cloned
Encoded in a two-gene operon
Fluorescent (except for the GFP variant from jellyfish Aequorea Victoria that can only fluoresce in bacteria)
Therefore, correct options are as:
Easily cloned
Encoded in a two-gene operon
Fluorescent (except for the GFP variant from jellyfish Aequorea Victoria that can only fluoresce in bacteria)
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Scientists discover an underwater cave that has a new, multicellular species within it. When they examine the species more carefully, they notice that is has a nucleus, is heterotrophic, and does not have a cell wall. In what kingdom should the scientist place the new organism?
A.Eubacteria
B.Plantae
C.Animalia
D.Fungi
In rabbits, the allele for black fur, B, is dominant over the allele for brown fur, b.
Calculate the probability of a homozygous dominant (BB) offspring resulting from a cross between two parents with the genotype Bb
The probability of a homozygous dominant (BB) offspring resulting from a cross between two parents with the genotype Bb is 25%, or 1/4.
When two parents with the genotype Bb are crossed, each parent contributes one of their two alleles to their offspring.
Possible gametes from the Bb parent are: B or b. The other Bb parent can also produce B or b gametes.
So, the Punnett square for the cross would look like this(See Table).
From this, we can see that there is a 25% chance of getting a BB offspring, since there is only one possible way of getting BB (from the top left square).
Consequently, 25%, or 1/4, of a cross between two parents with the genotype Bb will result in homozygous dominant (BB) offspring.
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1 ptNutrients that are absorbed by the plant roots from the soil are transported by what system?A.shoots systemtranspiration systemphloem systemplant reproductive system
Nutrients that are absorbed by the plant roots from the soil are transported by the C. Phloem system.
Phloem is a type of vascular tissue that is responsible for the transport of nutrients throughout the plant body. It is primarily composed of living cells and is located in the innermost layer of the stem, along with the xylem.The process of nutrient transport in the phloem is known as translocation. The phloem tissue consists of two types of cells, sieve tubes, and companion cells. The sieve tubes are responsible for the actual transport of nutrients, while the companion cells provide metabolic support to the sieve tubes.
The movement of nutrients in the phloem is facilitated by two mechanisms: pressure flow and mass flow. Pressure flow is the result of a pressure gradient established between the source (where the nutrients are produced) and the sink (where the nutrients are utilized). Mass flow, on the other hand, is the result of the bulk movement of nutrients along the phloem tissue.
Nutrients that are transported by the phloem include sucrose, amino acids, and other organic compounds. These nutrients are produced through photosynthesis in the leaves and are transported to other parts of the plant, such as the roots, flowers, and fruits. Therefore, Option C is correct.
The Question was Incomplete, Find the full content below :
Nutrients that are absorbed by the plant roots from the soil are transported by what system?
A. shoots system
B. transpiration system
C. phloem system
D. plant reproductive system
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