In which of the following scenarios would evolution by natural selection take place? (1 point)
O Microorganisms reproduce asexually, producing identical offspring
O Corn is genetically modified and cloned to make identical crops
O Penguins reproduce sexually, producing offspring that look different from one another
O A banana tree branch is planted, producing a clone of the parent tree
Answers
Evolution by Natural selection occurs when the offspring of genotypes are produced in response to the environment. Hence the correct option is C Penguins reproduce, offspring that look different from one another.
Evolution by Natural SelectionCharles Darwin and Alfred Russel Wallace developed the theory of Evolution by Natural Selection. For evolution by natural selection take place, Darwin described four essential conditions, these are:
Trait selection must be variable in the populationThe trait must be heritableThe struggle of existenceThe organism which fits to its environment.As per the question, penguins produced offspring that look different from another, this must be because of the evolution by Natural selection. Hence the correct option is C.
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Pasagot po asap
Science subject
Answers
light is an electromagnetic wave with color and frequency. Colors consist of different wave lengths and can be reflected or absorbed.
not 100% certain on 2 and 3 though
the three laws of motion
Answers
Answer:
The Newton's three laws of motion are Law of Inertia, Law of Mass and Acceleration, and the Third Law of Motion.
Explanation:
Answer: Hope This Helps!
Explanation:
Newton's First Law of Motion:
Newton's First Law of Motion states that an object in motion tends to stay in motion unless an external force acts upon it. Similarly, if the object is at rest, it will remain at rest unless an unbalanced force acts upon it. Newton's First Law of Motion is also known as the Law of Inertia.
Basically, what Newton's First Law is saying is that objects behave predictably. If a ball is sitting on your table, it isn't going to start rolling or fall off the table unless a force acts upon it to cause it to do so. Moving objects don't change their direction unless a force causes them to move from their path.
As you know, if you slide a block across a table, it eventually stops rather than continuing on forever. This is because the frictional force opposes the continued movement. If you threw a ball out in space, there is much less resistance, so the ball would continue onward for a much greater distance.
Newton's Second Law of Motion:
Newton's Second Law of Motion states that when a force acts on an object, it will cause the object to accelerate. The larger the mass of the object, the greater the force will need to be to cause it to accelerate. This Law may be written as force = mass x acceleration or:
F = m * a
Another way to state the Second Law is to say it takes more force to move a heavy object than it does to move a light object. Simple, right? The law also explains deceleration or slowing down. You can think of deceleration as acceleration with a negative sign on it. For example, a ball rolling down a hill moves faster or accelerates as gravity acts on it in the same direction as the motion (acceleration is positive). If a ball is rolled up a hill, the force of gravity acts on it in the opposite direction of the motion (acceleration is negative or the ball decelerates).
Newton's Third Law of Motion:
Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction.
What this means is that pushing on an object causes that object to push back against you, the exact same amount, but in the opposite direction. For example, when you are standing on the ground, you are pushing down on the Earth with the same magnitude of force that it is pushing back up at you.
The Barton Springs salamander is an endangered species found only in a single spring in the city of Austin, Texas. There is growing concern that a chemical spill on a nearby freeway could pollute the spring and wipe out the species. To provide a source of salamanders to repopulate the spring in the event of such a catastrophe, a proposal has been made to establish a captive breeding population of the salamander in a local zoo. The zoo was asked to provide a plan for establishing this captive breeding population, with the goal of maintaining as much of the genetic variation of the species as possible in the captive population.
What factors are likely to lead to a loss of genetic variation in the captive population?
a. increased rate of mutation
b. a founder effect
c. reduced genetic drift over time
d. a lack of inbreeding
What strategy would likely be effective in mitigating the loss of genetic variation in the captive population?
a. keeping the sex ratio as close to 50:50 as possible
b. stopping gene flow to and from the captive population
c. regularly mating individuals that are related
d. keeping the captive population as small as possible
Answers
Answer:
1) Option b is correct. a founder effect
2) Option a is correct. keeping the sex ratio as close to 50:50 as possible
Explanation:
The exposed situation is an example of an ex-situ conservation program. These programs are planned to keep and restore the population of species that are in danger of extinction. There are many challenges associated with captivity, and one of them is related to maintaining genetic diversity in the population.
1) Introducing a few animals of an endangered species into the zoo might be considered an example of the founder effect. Just a pregnant female is enough for it to occur. And the most significant problem associated with this event is the loss the genetic diversity or variability. When breeding animals in captivity there is a high risk of losing some genes and fixating others, due to inbreeding.
Genetic drift is the random change that occurs in the allelic frequency of a population through generations. The magnitude of this change is inversely related to the size of the original population. These changes produced by genetic drift accumulate in time. Eventually, some alleles get lost, while some others might set. Genetic drift affects a population and reduces its size dramatically due to a disaster or pressure-bottleneck effect- or because of a population split -founder effect-. In founder effect, a new population originates when a few individuals, coming from a bigger-sized population and carrying their genes, settle down in a new area and reproduce. This small population might or might not be genetically representative of the original one. Some rare alleles might be exceeded or might be lost by complete. Consequently, when the small population increases in size, it will have a genetically different composition from the original one. In these situations, genetic variability is reduced, and there exists the possibility of developing a peculiar allelic composition. When the number of individuals that originated the new population is low, the founder effect will be very extreme because the genetic drift effects are inversely proportional to the original number of individuals.
2) When selecting the animals that are being kept in captivity, it is significant to consider a few aspects concerning genetic diversity maintenance. The main objective is to prioritize the original genetic material.
To get founder individuals that get to represent the maximum genetic variability of the population, or among population if possible. The sex proportion of the founder individuals should always be 1:1 or 50:50. This ratio is important to keep genetic variability, especially because many males in captivity might have reproductive problems. To keep diversity, females need to mate with different males, and not just a few of them. Animals should be subadults reaching their sexual maturity.When mating animals, they should be as different as possible to decrease the possibility of a common ancestor among the couple.What is an advantage of a health maintenance organization (HMO)?
Answers
Answer:
if you use the hmo program you can have lower out-of-pocket costs for prescriptions.
1. Why should we care about drugs in our water?
2. How do drugs get into our water?
3. How can we remove drugs from our water?
4. How can we prevent drugs from getting into our water in the first place?
Answers
Answer:
4. stoping the drugs from geting in our water
Explanation:
GRB2 is the protein that links RTK signaling to integrins and focal adhesions. More precisely, focal adhesions sequester GRB2, removing it from the cytoplasm, and thus preventing it from transducing the signal from the RTK to Ras. Based on this information, say something meaningful about focal adhesions, namely something about the domain structure of one of the proteins within them.
Answers
Answer:
It transmit mechanical force and signals.
Explanation:
Focal adhesions are large macromolecular which is responsible for the transmission of mechanical force and regulatory signals between the extracellular matrix and an interacting cell. Focal adhesions act as the mechanical linkages to the ECM, and serves as a biochemical signaling hub to direct numerous signaling proteins at sites of integrin binding and clustering. 68-kD protein also known as paxillin is a type of protein which is part of cytoskeletal component that localizes to the focal adhesions.
Gimli has been working hard in a desert environment, but has neglected to drink any water to replace the 2L of fluid lost via sweat and respiratory losses (think 600 ml lost from the blood volume). He had to stop working because he felt weak, but still feels poorly after a few minutes of rest.
Gimli, is the cardiac contractility:________
a. increased
b. decreased
c. not significantly changed
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what is arranged in energy levels outside of the nucleus
Answers
Answer:
We will start with a very simple way of showing the arrangement of electrons around an atom. Here, electrons are arranged in energy levels, or shells, around the nucleus of an atom.
Explanation:
how is climate change most likely to lead to ecosystem instability
a. by causing extreme changes that organisms are not adapted to
b. by creating new islands through volcanic eruptions
c. by increasing predator populations to a point that cannot be supported
d. by causing increases in most prey populations
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Answer:
a. by causing extreme changes that organisms are not adapted to
Given the following DNA sequence, give the complementary strand: 5' A G T A T C C G T T A C 3'
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If a father is dominant for brown hair and the mother is dominant for brown hair, what would be the hair color of the offspring?
Answers
Answer:
The hair color of the offspring would be brown.
Explanation:
In which situation is speciation most likely to occur?
A large number of the population is exposed to a viral infection.
B few members of the population develop mutations in somatic cells.
C large number of the population migrates over a great distance.
D few members of the population are isolated from the others.
Answers
Answer:
D) because they separate, develop different traits therefore, they can no longer reproduce with each other.
You may assume the Sickle Cell locus is in Hardy Weinberg equilibrium. Also, the term carrier implies that the person has a particular allele in his/her genotype, but is not affected with the condition. If the proportion of an African population that are susceptible to Malaria is 0.688, what proportion of the population are carriers for the Sickle Cell allele (HbS)
Answers
Answer:
The frequency of the population that are carriers is 0.284 or 28.4%
Explanation:
According to Hardy-Weinberg equilibrium equation, p² + q² + 2pq = 1
Also, the sum of the allele frequencies for all the alleles at the locus, p + q = 1.
Where where p is the frequency of the dominant allele and q is the frequency of the recessive allele in the population.
p² = dominant h0m0zygous genotype frequency
2pq = heterozygous genotype frequency
q² = recessive h0m0zygous genotype frequency
From the given data; the dominant h0m0zygous genotype, i.e., the proportion of an African population that are susceptible to Malaria, p² = 0.688
p = √0.6880 = 0.829
But p + q = 1; q = 1 - p
Since p = 0.829, q = 1 - 0.829
q = 0.171
Frequency carriers for Sickle Cell allele, i.e., the heterozygous genotype = 2pq
Frequency of carriers = 2 × 0.829 × 0.171 = 0.284
Therefore, the frequency of the population that are carriers is 0.284 or 28.4%
PLZ HURRY I ONLY GOT 29 MINS LEFT
Answers
The answer is B: the convection of magma under the plates pulling them.
Answer:
The correct answer would be B!
"Geologists have hypothesized that the movement of tectonic plates is related to convection currents in the earth's mantle. ... Tremendous heat and pressure within the earth cause the hot magma to flow in convection currents. These currents cause the movement of the tectonic plates that make up the earth's crust."
Explanation:
- 英辞郎 <3
Which of the following group uses formylmethionine as the first amino acid in protein synthesis?
-Archaea only
-Bacteria only
-Eukarya only
-None of the above
Answers
5'-AUGGGUAACGGCGUG-3' is an mRNA sequence.
After translation, how many amino acids would this sequence contain in the protein?
Answers
Answer:
3???
Explanation:
It is also possible to extract DNA from your human cells. Would a cell in your liver contain the same chromosomes as a cheek cell? Explain.
Answers
Answer:
Yes
Explanation:
The genomic DNA found in all nonreproductive cells is the same, no matter what tissue the cells come from.
The genomic DNA determined in all nonreproductive cells is identical, regardless of what tissue the cells come from.
To get the DNA from a molecular, scientists normally rely upon certainly considered one among many DNA extraction kits to be had from biotechnology companies.
What is DNA extraction?During a DNA extraction, a detergent will purpose the molecular to pop open or lyse, in order that the DNA is launched into solution. Then alcohol is introduced to the answer reasons the DNA to precipitate out.DNA extraction is an ordinary system used to isolate DNA from the nucleus of cells.
Thus it is clear that yes we can extract DNA from your human cells.
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Suppose we have a disease phenotype that is determined by a single gene with two alleles. Further suppose it follows a autosomal recessive mode of inheritance with reduced penetrance. We have an individual who is unaffected (does not have the disease phenotype) and whose genotype is unknown. We cross this individual with a true-breeding affected individual. How many possible genotypes can this unaffected individual have at the disease locus
Answers
Answer:
three (3)
Explanation:
Penetrance can be defined as the proportion of individuals that have mutations associated with a genetic disorder and exhibit symptoms of having that genetic disorder. Moreover, reduced penetrance, also known as incomplete penetrance, indicates that an individual who carries mutations for a disorder but may never develop this disorder. Incomplete penetrance is frequent in some types of cancer, where individuals carry mutations (for example, mutations in the BRCA1 gene which is associated with an increased risk of ovarian cancer), but they may do not develop this condition during their lifetime. Incomplete penetrance may be a result of the interaction between genetic and environmental factors.
Where are gymnosperms’ seeds produced?
cones
flowers
spores
vascular tissue
Answers
Answer:
cones
i hope it helps mapriend
In the process of depletion, the soil loses the surface soil, which contains most of the organic matter.
True
False
Answers
A gardener plants 200 flowering plants of the same species. 98 plants have white (v) flowers and the remaining have violet (V) flowers. What must be the allelic frequency of each type of flower? ( p + q = 1, p2 + 2pq + q2 = 1)
A.
violet flowers = 0.55, white flowers = 0.45
B.
violet flowers = 0.62, white flowers = 0.38
C.
violet flowers = 0.3, white flowers = 0.7
D.
violet flowers = 0.49, white flowers = 0.61
Answers
The allelic frequency of each type of flower is violet flowers = 0.3, white flowers = 0.7, option C.
What is allelic frequency?The incidence of a gene variant in a population is represented by the allele frequency. The number of times the allele of interest is observed in a population is divided by the total number of copies of all the alleles at that particular genetic locus in the population to calculate the allele frequency and can be expressed as a decimal, a percentage, or a fraction.
To find the allele frequency:
Frequency = 98/200 = p = 0.49 for white (v) flowers
VV - dominant homozygote with violet flowers and with frequency p²
Vv - heterozygote with violet flowers and with frequency 2pq
vv - recessive homozygote with white flowers and with frequency q²
q² = 0.49 = √q² = √0.49 = 0.7
Therefore q in the formula p + q = 1, = p + 0.7 = 1
p = 1 - 0.7 = 0.3
The frequency for violet flowers, p is 0.3 and white flowers, q is 0.7 with substitution method of the "p + q = 1, p2 + 2pq + q2 = 1" formula.
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Help meee please ahhhhhhhh
Answers
Please help
Given the original DNA strand and the Mutated strand,
identify the type of Mutation.
Original DNA: ATC GGC TAA CGC TTA
Mutated Strand:
ATC CGC TAA CGCTTA
O Point Mutation or Subsitution
O Deletion
O Insertion
O Inversion
O Duplication
Answers
The products of the glycolysis of one molecule of glucose can drive the citric acid cycle
Answers
Answer:
Since glycolysis of one glucose molecule generates two acetyl CoA molecules, the reactions in the glycolytic pathway and citric acid cycle produce six CO2 molecules, 10 NADH molecules, and two FADH2 molecules per glucose molecule
The products of glycolysis alone are not sufficient to directly drive the citric acid cycle (also known as the Krebs cycle or the tricarboxylic acid cycle).
However, the output of glycolysis, specifically pyruvate, is a crucial substrate that enters the mitochondria, where it undergoes further processing before entering the citric acid cycle.
The energy carriers, specifically NADH and FADH2, play a crucial role in driving the electron transport chain, the final step of cellular respiration.
The electron transport chain uses the energy from NADH and FADH2 to generate a large amount of ATP through oxidative phosphorylation.
Thus, while the products of glycolysis do not directly drive the citric acid cycle, they contribute to the overall energy production and supply the necessary substrates, such as acetyl-CoA, which is essential for the initiation of the citric acid cycle.
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PLEASE ILL LITERALLY DO ANYTHING You have learned that the human body is made of different systems. These systems work together to help the body function. In this project, you will research how different body systems interact. OBJECTIVES Describe the interaction between human body systems. Directions Use online resources or a reference of your choosing to research two body systems from the list below. Write a 400 word essay describing each system and how they interact. Be sure to include the major organs and structures of each system. Also identify the functions and responsibilities of each system. Describe how each system depends upon the other. circulatory system respiratory system digestive system excretory system nervous system
Answers
Answer:
The Circulatory system has two organs the heart, and blood vessels. The heart pumps blood and the blood is carried away and back through blood vessels like capillaries, veins, and arteries. The Circulatory system works with the Respiratory system by carrying the oxygen that is brings in, and takes away the carbon dioxide to the Excretory system. The Circulatory system helps the Excretory system by bringing waste, and carbon dioxide to kidneys, and liver I believe it might be a different organ but I know the kidneys for sure.
The Nervous system consists of three organs the spinal cord, brain, and nerves. The two systems are the Central Nervous system is made up of the the brain, and spinal cord. The Peripheral system is made up of the nerves, which branch off from the spinal cord to all parts of the body. The Central Nervous system sends a jolt of electricity from the brain through the spinal cord to the nerves that branch of it to all parts of the body so that we can move. The Nervous system helps the Digestive system by sending electricity to the nerves so that we can swallow our food and so that we can digest our food. The Nervous system helps the Excretory system by detecting any changes in the salt levels in the blood through the urine in the Excretory system. By providing the brain with a constant supply of oxygen rich blood the Circulatory system helps the Nervous system, so the Nervous system regulates the heart rate and blood pressure. So that the Nervous system can regulate the Respiratory rate, and monitor the blood gas levels the Respiratory system supplies oxygen, and removes carbon dioxide.
The Excretory system consists of five organs the Large Intestine, Liver, Lungs, Kidneys, Skin. The Excretory system helps the Digestive system by getting rid of the waste it produces. The circulatory system helps the Excretory system by giving the kidneys, and the other organs in the Excretory system blood, and carry carbon dioxide from cells to the kidneys.
The Respiratory consists of five organs Lungs, Larynx, Trachea, Pharynx, and Bronchi. The Respiratory system provides the body with oxygen, and allows us to breath.
The Digestive System consists of nine organs, the Mouth, Esophagus, Stomach, Pancreas, Liver, Gallbladder, Small Intestine, Large Intestine, and the Anus. The Digestive system dissolves food and turns them into nutrients for cells, to give them energy, use for growth, and cell repair.
Explanation:
Hope this helps:)
keera ingram
Could someone pls help me
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Living things are shielded from harmful UV radiation by ozone inside the upper atmosphere, which keeps the sun's rays from reaching the planet's surface.
What really is ozone?The colorless, odorless reactive atmosphere known as ozone is created when three oxygen atoms combine. It can be found in nature blocking UV radiation that can damage the planet's life in the troposphere of the atmosphere.
Why does ozone so important?The atmospheric ozone layer in the stratosphere absorbs some of the solar radiation, preventing it from reaching the planet's surface. The main UVB energy that it absorbs is this kind of UV light. Numerous harmful effects are associated with UVB, a kind of ultraviolet rays emitted by the sun including sunlamps.
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Before classifying insects into different orders, review the larger classifications for insects:
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Conduct research online to determine the characteristics an organism must have to be classified in each of the taxonomy levels shown. Note the characteristics you find in the answer space.
Answers
Different types of kingdoms exist. All animals are considered to be members of the kingdom Animalia. It also goes by the name Metazoa. Animals that have both jointed limbs and hard exoskeletons make up the phylum Arthropoda.
What is a classification for insects?The following are some traits of arthropods: They are exoskeleton-equipped. Their appendages are joined. They are known to have segmented bodies.
Therefore, Examples of Order The Hemiptera Giant Water Bug Arthropoda, the phylum. Arthropoda Hymenoptera Bees, wasps, and ants Lepidoptera moths, butterflies, etc. Arthropoda.
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evaluate the effects that the harmful substances have on the effeciency of aerobic respiration and how this affects metabolic pathways
pollutants (asbestoos, oxidants)
drugs( ketamine, cocaine)
chemicalsin cigarettes( toxins, tar, nicotine
Answers
Which statement BEST describes parasitism?
A.
The parasite is able to live on the host while providing benefits to the host.
B.
The host is the one who benefits at the expense of the parasite.
C.
The parasite is the one who benefits at the expense of the host.
D.
The parasite and host mutually benefit from the relationship.
Answers
C. The parasite is the one who benefits at the expense of the host.
Explanation: Parasites are costly for their hosts as they divert resources for their growth, reproduction, and survival with no rewards for the hosts.
2. Which is probably most responsible for the
formation of this landform?
wind
water
plants
animals
Answers
The most likely factor in the creation of this landform is wind. The horizontal movement of air caused by a pressure differential between two locations is known as wind.
What does wind mean in both senses?Wind is the flow or rush of winds or an air stream, and it corresponds with bend and tend. The metaphorical term "wind" can also refer to a force that drives social or political change. A person who has run out of energy is described as winded. The word "wind" can also refer to a person's breath.
Why does wind exist?The uneven burning of the Planet by both the sun and also the Earth's rotating motion result in wind, which is the air's movement. Light breaths to natural disasters like hurricanes and tornadoes are all types of winds.
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