D. Producers provide primary consumers with the chemical energy
they need
Which is...when tumors cause blood vessels from the circulatory system to grow into the tumor ,preventing oxygen and nutrients from travelling to other cells
Weathering, acid rain can mostly destroy like stone, I suggest you look up pictures of acid rain and how it affects (limestone)
Convergent evolution would be the best way to explain why two species that look similar are not necessarily that closely related. In convergent evolution, distinct species develop similar anatomical characteristics after its divergence from one common ancestor that does not possess the initial characteristic.
<span>Gametes are haploid cells that fuses with another haploid cell during fertilization. For human being, the gametes are the egg cells and the sperm cells and human fertilization is the union of a human egg and sperm, which usually occur in the ampulla of the fallopian tube. </span>
