Which pair of statements best describes an essential amino acid?

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.

Abnormal softening of a gland is known as

Identify any four organelles that should be present in the eukaryotic organism and describe the function of each organelle