Calculate the density of mercury to the nearest tenth.

Mass of mercury = 57 g

Volume of mercury = 4.2 mL

Plz ! cattle ranchers and dairy farmers rarely allow all of their animals to reproduce instead they practice selective breeding and only encourage the reproduction of animals with specific features. which of the following cows would a dairy farm most likely choose to reproduce? a. a cow that makes a lot of milk. b. a cow that can run quickly. c. a cow with a think, soft fur. d. a cow with large, strong hooves.

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

The chemical form of energy that is useable by the cell to do work