Answer:
B
Explanation:
It would not be D because D is the location of a common ancestor, AKA an animal that does not haver jaws or bones. It would not be C because the question states that the fish has jaws, and C does not have jaws since the arrow does not point to that. It would not be A because the question states the fish has "NO TRUE BONES", meaning that there are no bones present. And in A, there is the bones arrow pointing to it, meaning that A has bones since that trait is on the same horizontal line as A. Only leaving us with option B left, since it came from an ancestor with jaws but not from an ancestor with bones. Sorry, I'm not the best with explaining but hopefully that makes sense why it is B, it's like a family tree, you just have to follow it carefully :) I hope that helps
The correct option for this problem is A. Comets.
Answer:
One of the structural barrier that a cell might have to overcome in order to go through mitosis is described below.
Explanation:
Structural barriers can be described as any of the structural changes in the structures of the body which do not allow it to perform its normal function.
The chromosomes of a cell have to arrange in a certain manner for the process of cell division to occur. Sometimes, the chromosomes might become so damaged that the normal DNA repair factory is unable to repair the chromosomes. The damage in the chromosomes might arise due to a number of reasons such as exposing to UV light or any kind of toxic chemical. To overcome this obstacle, certain extrinsic factors can be utilized to fix the damaged chromosomes. This is an example of the structural barriers which might be overcome by a cell for mitosis.
