Which tree would have a “naked seed”?

The development of a head with an accumulation of nerve tissue into a brain is ____.

Tapeworms are in the phylum ___.

Which of the following tissue types in the plant gives rise to the other 3 types?

The part of a body of water where light does not penetrate is the littoral zone.

All the populations interacting in an area.

Clams and snails are in the phylum ___.

Process by which substances (lead, mercury, PCB, DDT) become more concentrated in the higher trophic levels of a food web.

An underground horizontal stem.

The stigma, style, and ovary are parts of the __.