C i am guessing but i hope this helps
As the number of organisms increase so does their tropic levels. As one organism eats the other energy is being transferred to that organism. The larger the food chain the lesser the organism' s would be because they would lose energy while trying to hunt and catch their prey and other activities. The food chain usually ends at the tertiary consumer or the fourth link because if it goes on like that there would be less energy hence these organisms would most likely starve and gradually die.
Viruses are not cells; they are a strand of genetic material within a protective protein coat called a capsid. They infect a wide variety of organisms, including both eukaryotes and prokaryotes. Once inside the cell, they use the cell's ATP, ribosomes, enzymes, and other cellular parts to replicate.
Positive feedback: breast feeding, giving birth, and blood clotting are two examples.
Negative feedback: Blood glucose levels, temperature control, and body temperature are two examples.
-Negative feedback: accumulation of an end product of a process slows that process.
-Positive feedback: the end product speeds up its own production. Regulation is important because without it we would bleed out from small cuts because we wouldn't be able to form blood clots. Or we wouldn't be able to form ATP. Regulatory mechanisms help us do the important tasks needed to sustain life.
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Answer:
A) altering the nucleotide sequence of the DNA fragment
Explanation:
Gel electrophoresis is a technique to separate the DNA fragments on the basis of their charges and size. DNA fragments are made to migrate through a gel in an electric field. DNA has nucleotides and the presence of phosphate groups makes it a negatively charged molecule. In the gel electrophoresis, DNA fragment migrates through the gel toward the positive pole. Also, the gel slows down the large molecules more than the small molecules. Therefore, the DNA fragments are separated by size. However, the sequence of the nucleotide of DNA fragments does not affect the rate of their migration in the gel.
