In eukaryotes, the normal or default state is that genes are turned _____.

Preferably, a pre-game meal should be eaten about ________ before an endurance event.

A patient is diagnosed with leukocytosis if they have more than __________ wbcs/l.

A(n) ________ is a printed record of the brain's electrical activity over a period of time.

A surge in __________ directly triggers ovulation.

The group that needs the most sleep during a 24-hour cycle is __________.

Natural selection is best described as _______.

Natural selection is an evolutionary mechanism by which _______.

Memory t cells can be up to __________ old.

Linked genes are usually ________.

Layers b and c collectively form the __________.