BIOLOGY HIGH SCHOOL

Why are frogs said to have 2 lives

Answers

Answer 1
Answer: Amphibian means two-lives, Frogs began there lives in the water as eggs and then grow to tadpoles, when they are fully developed they live on land.
Answer 2
Answer: they start their life in water as a tadpole then they adapt to land and go through metamorphosis to become a frog

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Bones provide both structure and protection for the body. Please select the best answer from the choices provided.a. True
b. False

Answers

Bones provide both structure and protection for the body is absolutely true. Bones or your skeleton protects all the organs in your body.

Final answer:

Bones provide structure and protection for the body, they work with muscles and joints to allow movement and protect various organs. Therefore, the correct answer is True.

Explanation:

The statement that bones provide both structure and protection for the body is True. Bones provide structure by working together with muscles and joints to allow movement. Bones also protect the body's various organs. For example, your skull protects your brain, your rib cage protects your heart and lungs, and your spine protects your spinal cord.

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What do parasitism, predation, and commensalism have in common? How are they different?

Answers

They are all relationships involving two animals where at least one animal benefits.
Parasitism- Where one organism benefits while the other is harmed. Examples-Mosquitos, ticks
Predation- Where one animal benefits and the other is harmed (or DEAD)
Example- Shark eats seal.
Commensalism- Where one organism benefits while the other is unaffected. Example-Bird riding on cows horns.

Which of the following organisms would you expect to have the largest surface-area-to-volume ratio? Assume that all of the following are the same total length. _____ Select one: a. a rotifer b. a mollusk c. an annelid d. an arthropod e. a platyhelminth

Answers

The organism that should be expected to have the largest surface-area-to-volume ratio is option  e. a platyhelminth.

What is a platyhelminth?

It contained soft bodies. it should be considered as the bilateralsymmetrical. It should be free-living in nature. Also, it consist the marinespecies and the other should live in the freshwater. The anterior part of the body should possess the mouth. Here the organ should be situated along with the size of the body.

hence, option e is correct.

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Answer:

The preferable option will be - E.

E. A platyhelminth has the largest surface-area-to-volume ratio.

Explanation:

Platyhelminth  :

  1. They have soft bodies.
  2. Their body is bilaterally symmetrical.
  3. They are free-living.
  4. Some of them are marine species and others live in freshwater or moist transitional environments.
  5. At the anterior part of their body, possesses their mouth.
  6.  Their organ is situated along their body size.
  7.  They are divided into four classes such as : Turbellaria, Monogenea, Trematoda, and Cestoda.
  8. E.g, flatworm, tapeworm, monogenea, flukes etc.

       

What is it called when two forms of a trait are both dominant at the same time

Answers

It is called Codominance. In this condition, two forms of a trait or alleles are both present in the phenotype. For example, in feather color of hens, the alleles will be W for white and B for black. Possible genotypes in codominance will result to WW white BB black and BW speckled.

Answer: Codominance (apex)

Why is UVA light considered a mutagen?It penetrates the skin and can cause mutations.

It can be prevented by wearing a protective vest.

It produces chemicals that can be inhaled.

It is found in synthetic dyes and cosmetics.

Answers

The answer is It penetrates the skin and can cause mutations.


An agent able to cause DNA mutations is called mutagen. UV light is the most common source of radiation that affects DNA, but it is a weak radiation and it penetrates only the surface cells of your skin. However, UVA radiation is considered as a mutagen because it penetrates deep into the skin and can cause mutations. 

Final answer:

UVA light is a mutagen because it can penetrate the skin and cause DNA damage. This damage can lead to mutations and potentially skin cancers. Protective clothing and sunscreen can help mitigate the risk.

Explanation:

UVA light is considered a mutagen because it has the ability to penetrate the skin and cause mutations. It does this by causing damage to the DNA in the cells of the skin. When UVA light hits the skin, it can break DNA strands or cause errors during DNA replication, which can result in mutations. Over time, these mutations may accumulate and lead to skin cancers like melanoma.

One way to protect oneself from UVA light is by wearing protective clothing or using sunscreens. However, prevention is not always complete, as some amount of UVA light can still get through these protective barriers.

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Once inside the erythrocyte, the merozoite enlarges and becomes a ring trophozoite. The trophozoite's nucleus divides asexually to produce a multinucleate schizont. What process occurs for the trophozoite to become the schizont?

Answers

Answer:

im pretty sure its mitosis

Explanation:
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