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Damm [24]
3 years ago
6

Nitrogen fixation is carried out mainly by...

Biology
1 answer:
Ghella [55]3 years ago
8 0
I think the answers are 2
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Alfred Wegener's theory about earth's past included a supercontinent made up of all the continents put together. What was the na
exis [7]
Pangea was the name of the supercontinent
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3 years ago
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Ovules produced by an entirely green plant contain a rare mutation in a nuclear gene that is involved in chlorophyll synthesis,
sveticcg [70]

Answer:

The plant will produce less chlorophyll

Explanation:

The plant still has a functional allele provided by the paternal gamete, thereby the leaves have this enzyme required for chlorophyll biosynthesis. In consequence, the plant can produce chlorophyll pigment but in less quantity, since it has only a functional allele coding for a key enzyme involved in the chlorophyll pathway  

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3 years ago
1)Which of the following is a source of genetic variation
Svetllana [295]

The answer is; B

Mutations change the order of nucleotide and therefore affects codons that code for proteins. A different protein is thus produced from the wild type hence creating variations.  Genetic shuffling in sexual reproduction, also called gene recombination occurs during meiosis and also when different organisms exchange genetic material such as in bacteria.  

6 0
3 years ago
*WILL MARK BRAINLIEST IF CORRECT*
wolverine [178]

This is all about dominant and recessive genes. According to the picture it looks like the yellow flowers have the dominant genes YY and the green flowers the recessive yy. You breeded the YY with the yy to get Yy.  Now you have a plant with the dominant and recessive gene. The green flowers are  recessive so if you breed 'y'  with anything you get yellow flowers whether they only have the'Y' gene or the both 'Y' and 'y'.

6 0
3 years ago
How do radiation and chemotherapy affect cancer cells?
elixir [45]

Answer:

They destroy the DNA or RNA

Explanation:

Cancer drugs work by damaging the RNA or DNA. The faster the cancer cells divide, the more likely it is that chemotherapy will kill the cells, causing the tumor to shrink. They also induce apoptosis. Radiation therapy is a cancer treatment that uses high doses of radiation to kill cancer cells and shrink tumors. The radiations also induce apoptosis. Cancer cells whose DNA is damaged beyond repair stops dividing and die. The damaged cells die, they are broken down and removed by the body.

7 0
3 years ago
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