Answer
decomposers end the food chain but technically the food chain never stops
<span>indicate a common ancestor exists between two organisms
</span>
NOT:
result from evolution in a similar environment
are features which organisms still have but no longer use
<span>develop when a mutation occurs in the DNA of an organism</span>
Answer:
The Y chromosome is present in males, who have one X and one Y chromosome, while females have two X chromosomes.Explanation:
