An entire species of rare flying insects have gone extinct. Out of every three individuals of an extinct animal, two of the three carried a defective gene. How many animals carried the normal gene in a population of 300? Select one:

a. 100
b. 400
c. 300
d. 200

Which class of molecules contains the amino group, nh2 (a) sugars (b) water (c) proteins (d) hydrocarbons

Atypical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. (a) what is the volume of the cell including the membrane? (b) what is the volume of the cell membrane? (c) what percent of the total volume does its membrane occupy? to simplify the calculations, model the cell as a sphere. enter your answers using four significant figures.

Compare the composition of the moon's surface with the composition of the earth's surface.