Answer:
a molecule that is produced by a living organism.
Explanation:
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If a person's blood pressure is too high or too low, how might the other organ systems in their body be affected?
Answer:
When blood pressure is too high, organs and blood vessels can be damaged. High blood pressure can even cause rupture of a blood vessel and lead to bleeding or other complications. When blood pressure is too low, not enough blood reaches all parts of the body.
Explanation:
what is a carbon compound
Answer:
Carbon compounds are chemical substances that contain carbon atoms bonded to any other element.
Explanation:
Answer:
Carbon compounds: Chemical substances that contain carbon.
Question 16 (1 point)
Which solution will have the highest concentration?
a: Mix 4 ml solvent with 21 mL solute.
b: Mix 4 mL solute with 21 mL solvent.
c: Mix 10 mL solute with 10 mL solvent
Annette's maternal grandfather died of Huntington's disease when he was 53 and Annette was 8. Huntington's is a rare autosomal dominant degenerative neural disorder that usually hits people in their late forties, early fifties. Annette loved her grandfather very much and was deeply affected by the painful progression of his disease. She wants to get pregnant but does not want to risk giving birth to a child that will suffer as much as her grandfather. If she tested positive for Huntington's, what is the probability of her first child to develop Huntington's? Of her second child? Of her mother? (Note that since Huntington’s is so rare, you can assume that neither grandmother, nor father or partner have the Huntington’s mutation).
Answer and Explanation:
Huntington disease is caused by a mutation in the gene that codifies for the Huntingtin protein (Htt). The mutation produces an altered form of the protein leading to the neuron´s death in certain areas of the brain.
Huntington disease characterizes for being,
• Hereditary, passing from generation to generation. To express the disease, a person must have been born with an altered gene.
• Autosomal, affecting men and women equally, because the mutated gene is located on an autosomal chromosome.
• Dominant, which means that by getting only one copy of the altered gene coming from any of the parents, the receiving person will express the disease. The mutation in the gene dominates over the normal gene copy.
• Expressed by heterozygosis. Most people affected by the disease are heterozygous, with a normal copy and a mutated copy.
An affected heterozygous person has 50% of chances to give a normal recessive allele or an altered dominant allele. When one of the progenitors is a carrier and the other one is a healthy person, the progeny have 50% of probabilities of inheriting a dominant allele expressing the HD from the affected parent.
In the exposed example, Annette probably is heterozygous, Hh, and she marries a healthy man, hh.
Parental) Hh x hh
Gametes) H, h h, h
F1) 1/2 Hh, 1/2 hh
The probability of the first child to develop HD is 50%, or 1/2
The probability of the second child to develop HD is also 50%
The probability of both children to develop HD is 1/2 x 1/2 = 1/4, or 0.25
Now, Annette´s grandpa had the disease, Hh
Annette´s grandma did not, hh
The probability of her mother to develop HD is 50% because she could just inherit the dominant allele from her father.
What are the male and female reproductive parts of a flower
Answer:
Structure. As a plant's reproductive part, a flower contains a stmen (male flower part) or pistil (female flower part), or both, plus accessory parts such as sepals, petals, and nectar glands .
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You have discovered a very small amount of dna from an ancient organism that you want to save and study. what is the very first thing you should do to allow you to study this dna in the lab?
Answer:
PCR amplify the DNA
Explanation:
3. Briefly summarize in your own words what alternative explanations have been proposed for melanism that do not have to do with bird predation.
Answer & explanation:
Melanism occurs due to a genetic mutation that causes the excessive and concentrated production of the black pigment, called melanin. The consequence is living beings with darkened skin or fur. There are three types of melanism.
Adaptive melanism occurs by the need to adapt to the environment, a condition that will be passed through the generations. This melanism allows animals to camouflage themselves during hunting or to hide from predators.
Industrial melanism is related to human interference, especially industrial activities, in the lives of animals (dark-colored moths are the best-known cases). Air contamination is one of the main factors for this condition.
There is also pseudo-melanism, which partially affects animals and is generally motivated by genetic mutations. In certain species, the characteristic spots and stripes appear larger and darker than usual. This type of melanism is very present in cats such as tigers, cheetahs, leopards. However, other animals can still be affected.
how are babies produced specifically?
Answer:
Babies are made when special cells called sperm (produced by men) combine with cells called eggs (produced by women) in a process called conception. Each of these cells is produced by a process called meiosis which makes cells containing half the information of the parent.
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Answer:
when a dude's swimmers hit up a lady's egg a baby forms inside of the girl and 9 months later it comes out the same way it came in
Explanation:
Imao
What are two biotic factors and two abiotic factors in the photo below.
In the tundra, what is the difference between the biotic and abiotic factors you saw in the image?
How do the biotic and abiotic factors you chose interact?
Answer:
the 2 biotic factors are the plants in the corner and the 2 reindeer
The 2 abiotic factors in the image are the water and the mountains
The difference between the biotic and abiotic factors is that the biotic factors are living and the abiotic factors aren't living things.
The water gives nutrients to the reindeer.
Explanation:
Biotic factor are living things Abiotic factor are non-living things (;
what is an annealing
Match the columns:
1. attaches bones to bones and muscles to bones
2. insulates against heat loss
3. forms the fibrous joint capsule
4. makes up the intervertebral discs
5. composes basement membranes; a soft packaging tissue with a jellylike matrix
6. forms the larynx, the costal cartilages of the ribs, and the embryonic skeleton
7. provides a flexible framework for the external ear
8. provides levers for muscles to act on
9. forms the walls of large arteries
Key
a. adipose connective tissue
b. areolar connective tissue
c. dense irregular connective tissue
d. dense regular connective tissue
e. elastic cartilage
f. elastic connective tissue
g. fibrocartilage
h. hyaline cartilage
i. osseous tissue
Answer:
I have matched them below
Explanation:
each of the columns have been properly matched below:
1. attaches bones to bones and muscles to bones = d. dense regular connective tissue
2. insulates against heat loss = a. adipose connective tissue
3. forms the fibrous joint capsule =
c. dense irregular connective tissue
4. makes up the intervertebral discs = g. fibrocartilage
5. composes basement membranes; a soft packaging tissue with a jellylike matrix = b. areolar connective tissue
6. forms the larynx, the costal cartilages of the ribs, and the embryonic skeleton = h. hyaline cartilage
7. provides a flexible framework for the external ear = e. elastic cartilage
8. provides levers for muscles to act on = i. osseous tissue
9. forms the walls of large arteries = elastic connective tissue
Sensation is the process of:
Answer:
Sensation is the process through which senses pick up visual, auditory and other senses and then transmit to brain
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What is photosynthesis?
Photosynthesis is the process by which plants
use energy from sunlight to produce food.
Without photosynthesis, life on Earth simply would not be possible.
Without photosynthesis, we would not be able to breathe
because it gives off the oxygen that we breathe into our lungs.
The ability of water to act as a solvent for so many substances is due to its _______.
Answer:
The ability of water to act as a solvent for so many substances is due to its structure, it can dissolve many ionic and polar molecules
Explanation:
polar nature Water's tendency to share electrons unequally makes it a polar molecule. The slight charge on either side of the water molecule allows it to bond (create a solution) with any atom with a positive or negative charge.
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Muscle cells contract using ATP. There is little ATP in your blood stream. How do your muscle cells get ATP they need to contract and move you?
Answer: Aerobic ATP Production
Explanation: During everyday activities and light exercise, the mitochondria of muscle fibers produce ATP in a process called aerobic respiration. Aerobic respiration requires the presence of oxygen to break down food energy (usually glucose and fat) to generate ATP for muscle contractions
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A runner has a speed of 25 m/s. They see the finish line and speed up to 30 m/s. This happens in 5 seconds. If the runner has a mass of 75 kg, with what force did the runner cross the finish line? Show all work to receive full credit.
I know the answer is 75N but I don't know how to get 75N
Given parameters:
Initial velocity = 25m/s
Final velocity = 30m/s
Time = 5m/s
Mass of runner = 75kg
Unknown:
Force to finish the race = ?
Solution:
Force is defined as a pull or push on a body. According to Newton's first law, we can mathematically express force as the product of mass and acceleration;
Force = mass x acceleration
But we know that acceleration is the change in velocity with time, so;
Acceleration = [tex]\frac{Final velocity - Initial velocity}{time}[/tex]
So, force;
Force = mass x [tex]\frac{Final velocity - Initial velocity}{time}[/tex]
Input the parameters and solve;
Force = 75 x [tex]\frac{30 -25}{5}[/tex] = 75N
The runner crosses the line with a force of 75N
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plants need carbon dioxide to survive, plants get this gas from ________, which is something all living things (organisms) need.
Answer:
the air
Explanation:
Why is cell division important after fertilization?
Answer:
Perhaps most importantly, without cell division, no species would be able to reproduce—life would simply end (or would have ended a long time ago). Every human, as well as every sexually reproducing organism, begins life as a fertilized egg (embryo) or zygote.
Cell division is important after fertilization because it is necessary for growth and multiplication.
CELL DIVISION:
Cell division is the process by which a single cell is duplicated to produce more copies of itself. Fertilization is the process that joins a sperm and egg cell together in sexual reproduction to form the zygote. However, the diploid (2n) zygote needs to grow and multiply. Hence, the zygote formed as a result of fertilization undergoes a form of cell division called mitosis. Therefore, cell division is important after fertilization because it is necessary for growth and multiplication.Learn more at: https://brainly.com/question/3327479?referrer=searchResults
Which value is most likely to be the pH of a salt that is formed by the reaction of a weak acid and a strong base?
2.0
6.8
7.0
8.7
Answer:
8.7 (D)
Explanation:
A weak acid (anything below 7 on a PH scale) and a strong base (anything above 7 on a PH scale). The strong base will counter act the weak acid and dominate it meaning the answer will be above 7 giving you 8.7
The correct answer is 8.7
What is pH?
pH is the measure of the acidity and basicity of a solution.
The pH scale usually ranges between 0-14 pH less than 7 are strong base pH more than 7 are weak acidsWhy other option are incorrect?From the given options the Option 8.7 is the value which is greater than 7 is a strong base Hence 8.7 is correct and others are incorrect.
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You are working in a lab trying to identify a new organism. It looks like a plant, but it could be a fungus. Which of the following tests would NOT be useful in determining which it is?
A. Testing to see if part of the organism grows underground
B. Testing it for Chloroplasts
C. Testing it to see if it absorbs food from the soil
D. Testing it for Chitin
Testing to see if part of the organism grows underground would not be useful in determining whether it is a plant or a fungus.
How other tests would help in determining the organism?Testing it for chloroplastsPlant and green algal cells have a structure called a chloroplast, which is where photosynthesis takes place.A plastid is a sort of body that is formed like a disk, an oval, or a circle and is used to synthesize and store food. Chloroplasts are one type of plastids. The green color of chloroplasts sets them apart from other types of plastids.If the given organism shows a positive test for chloroplast then it is a plant otherwise fungus.Testing to see if it absorbs food from the soilAlmost the majority of the water and nutrients consumed by terrestrial plants are taken up by their roots from the soil.Therefore if the given organism absorbs nutrients from the soil then it is a plant.Testing it for ChitinMost fungi, contain chitin. Alpha-chitin makes up the majority of these fungi's cell walls.If the given organism shows a positive test for chitin then it is a fungus.
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Which statement describes lichens?
Answer:
Lichens are a symbiotic relationship of algae and fungi. The fungi being a saprophyte, collects required nutrients, and gives it to its algae partner, being an autotroph, helps the whole plant by giving food.
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Which of the following examples of membrane transport requires energy from ATP?
a. Movement of Nations from a lower concentration inside the cell to a higher concentration outside of the cell
b. Movement of glucose molecules from a higher concentration outside of the cell to a lower concentration inside of the cell
c. Movement of water into a cell
d. None of the above
Answer:
Active transport uses energy to transport molecules across the plasma membrane. This uses energy from ATP. They also use pumps to get molecules in or out of the cell. Passive Transport does NOT use energy to transport molecules across the membrane.
Explanation:
Which part of the plant and animal cells in the animals does cellular respiration take place
cellular respiration in eukaryotic cells takes place in the mitochondria. Both animal cells and plant cells depend on cellular respiration for their energy needs, because both animal cells and plant cells need ATP.
3. How many times can the nuclear DNA replicate during the life cycle of a cell? *
Always
Only once
Twice
Many times
how does density affect refraction?
Answer:
Density of any substance or medium determine the amount of light that will be refracted.
Explanation:
Density of any substance or medium determine the amount of light that will be refracted.
The higher is the density of any medium, the higher will be the number of atom or molecules in a given medium and hence more obstruction will be produced for light. High density also causes high refractive index.
The light usually bends away from the normal when light travels from a region of low to high density and light bends towards the normal when light travels from a region of high to low density
1. Identify the layer of the atmosphere that is constantly being hit by photons, has very low pressure, and temperatures that decrease from 120° Celsius to -80° Celsius as you move down through the layer.
Answer:
Mesosphere
Explanation:
The Mesosphere is a layer of the atmosphere that is above the Stratosphere and below the Thermosphere. This is the third layer of the atmosphere. Some of its characteristics include;
1. It is constantly being hit by photons: These photons are in the form of meteors that constantly hit this layer of the atmosphere. Meteors which are particles of dust release light energy that makes them visible to the human eyes as shooting stars.
2. The layer is characterized by very low pressure. This makes the air here thin and as the altitude increases, the air becomes very cold.
3. Temperatures decrease from 120° Celsius to -80° Celsius as you move down through the layer: The temperature in this layer decreases as the altitude increases.
Data supports your claim.
True
False
Answer:
true
Explanation:
because the data needs sometimes to support you
Why do most people think mutations are dangerous?"
Which is the best definition of directional selection?
- a process by which two species can no longer reproduce
- a process by which one of the extreme variations of a trait is favored
- a process by which individuals with either extreme of a trait are favored
- a process by which average individuals in a population are favored
Answer:
a process by which one of the extreme variations of a trait is favored
Explanation:yous welcome
Answer:
A process by which one of the extreme vartion of a trait is favored