Select all the sources of the heat inside earth that are listed below.
a. mantle convection
b. earth's magnetic field
c. radioactive substances
d. lava on earth's surface
e. gravitational contraction
f. past bombardment by asteroids

Building glycogen from glucose molecules is an example of what

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. single-celled organisms may use cell division as their method of reproduction. regardless of the reason for mitosis, the process ensures genetic continuity. what is the step in the cell cycle that ensure genetic continuity?