The answer is C. nitrogen.
Plants are main producers in ecosystems so, primary productivity of ecosystems depends on them. Carbon is necessary for plants, but it is widely present in plants. On the other hand, calcium and sodium are not as essential. However, nitrogen is important for plants because it is necessary to make proteins. Proteins take part in many different processes such as photosynthesis (this is actually primary productivity). But, nitrogen is not available to plants, they cannot absorb it simply from the air but rely on some symbiotic bacteria which are able to.
D. only in the nucleus. DNA or (deoxyribonucleic acid) is what makes you... YOU! All of your traits (Hair color, Eye color, The shape of your ears, Cancer risk, SKIN COLOR, etc.) But DNA is only housed in the nucleus of the cell, so the nucleus is the only place the transcription of the melanin gene could take place.
<span>To describe something is akin to showing someone the painting. To explain it is to also show them the video.</span>
<u><em>Answer: Formation differs in that protostomes form a coelom when the mesoderm splits, whereas the deuterostomes form a coelom when mesoderm cells combine, resulting in the body cavity. This formation occurs during the gastrula, or three-layered structure stage of development.</em></u>
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<u><em>Explanation:</em></u>
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Step 1:
The bacterium cell must copy its DNA so the new cells will have DNA. DNA or, deoxyribonucleic acid, has all of the information the bacterium will need to survive, so it is important it gets copied. The DNA is tightly wound so it is in a neat package called a chromosome.
Steps 2 and 3:
The bacterium now grows larger. This allows for some separation between the two DNA copies that are inside the cell. A division develops in the middle of the bacterium. This division eventually completely divides the bacterium in half. This is called cytokinesis.
Step 4:
Each cell is now called a daughter cell and they separate.
The steps of binary fission
binary fission
Binary fission results in two identical daughter cells. This is a type of asexual reproduction, or creating genetically identical offspring. If humans were able to reproduce using binary fission, it would look something like this: your mother or father would grow larger, and inside all of his or her DNA would be copied. Eventually your parent would split in half creating an identical clone.
