In which layers of Earth do convection currents occur?

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.

Based on the law of dominance, we would expect percent of the offspring from this cross to have large teeth.

What is the most appropriate method of gaining weight (muscle mass)