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3 years ago

Which came first: sexual or asexual reproduction?

1 answer:

8 0

If i remember correctly asexual reproduction came first because without asexual reproduction the cells would not have been able to produce other cells so what few cells there were reproduced asexually and then it evolved onto sexual reproduction later in development

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Lymphocytes that are clones of activated B cells or T cells that enhance resistance to future infection are called:

Nata [24]

Maybe a? I dont know

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3 years ago

Describe the experiment, to show that light intensity, water, chlorophyll, and cabondioxide are needed for photosynthesis

lisov135 [29]

Answer:

Is light needed for photosynthesis?

1. Destarch the plant (remove previously made starch from plant)

2. a. cut the leaf in 2

b. 1 part in an opaque box and 1 part in a transparent box (one with light and one without)

3. Test for starch (BEWI)

B. Is carbon dioxide needed for photosynthesis?

1. Destarch the plant (remove previously made starch from plant)

2. a. cut the leaf in 2

b. 1 part in a box with CO2 absorber and 1 part in box with a CO2 provider

3. Test for starch (BEWI)

C. Is chlorophyll needed for photosynthesis?

1. Destarch the plant (remove previously made starch from plant)

2. Use a variegated leaf

3. Test for starch (BEWI)

B E W I

1. Put leaf in boiling water to destroy the cell membrane and denature enzymes

2. Ethanol in a hot water bath to remove chlorophyll

3. Warm water to soften the leaf

4. Add drops of iodine solution

Explanation:

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3 years ago

The nucleotide that is found in DNA but not in RNA

mihalych1998 [28]

Virus is the only organism which has only one strand

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4 years ago

Which of these is a predator?

pentagon [3]

D)carnivore
I hope this works bro

6 0

3 years ago

Read 2 more answers

1. Dr. Lairmore makes the point that veterinarians don't just treat "the animal," but approach treatment from a "one health" per

poizon [28]

Other things veterinarians are looking at is the boundary between animals, people, and the environment. Veterinarians need to work with human doctors to work on food safety, problems connected to cancer, etc. Veterinarians and human doctors can get facts from each other. The problems we face in society means that they have to cooperate with both the animal health side, the human health side, and environment side as well. One way they think of “one health” is evolving viruses. They are looking at this to find a solution by the use of comparative medicine and observing the environment.

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3 years ago