Cosmic background radiation

a. is very hot.
b. is blue-green.
c. comes from supernovas.
d. comes equally from all directions.

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 distribution of related animals and plants across the world

What type of plant is good for a bioassay and where can i buy it? i only have a month.