D. A struggle for existence is apparent.
If a struggle for existence is apparent, natural selection occurs because all of the weak/unfit/unadapted ones die.
Here is a hint, mitosis is the division of cells.
Habitat destruction is the cause of the loss of species because the organism have been deprived of their living requirements.
Answer:
Biological
Explanation:
The biological species concept differentiates one species from the others on the basis of reproductive isolation. It assumes that the two organisms that belong to different species can not interbreed to produce a viable and fertile progeny. On the other hand, the members of the same species can reproduce with each other to produce progeny. In the given example, the populations of damselflies are observed for their reproductive behavior. Since the flies of all the populations are able to breed with each other, they belong to the same biological species.
30 cups is the same as 2.1 liters.
