In a negative feedback reaction the end product or hormone is not produced when levels of that hormone are in acceptable quantities.
True
False

The following image is of a diatom. it lives in water and gets food from photosynthesis. it is encased in a hard shell made of something similar to glass or sand . a diatom is a(n) because it has a) multi-celled organism; specialized parts. b) vertebrate; a skeleton. c) insect; an exoskeleton. d) single-called organism; only one cell.

The many volcanoes located along the edge of the pacific ocean make up the ring of fire. how does subduction play a role in the volcanic activity in the ring of fire?

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes