To control the cell cycle,

A) the activity of Cdks stays the same throughout the cell cycle.
B) cyclins fluctuate during the cell cycle.
C) Cdks are active only when they are released from cyclins.
D) the anaphase-promoting complex stimulates DNA replication.
E) M-Cdk inhibits mitosis.

Cardiac muscle cells have ____ that connect cytoplasm of adjacent cells.

A) sarcomeres
B) a pericardium
C) tight junctions
D) gap junctions
E) desmosomes

Which of the following structure(s) is/are only found in a plant cell?

A) centrioles
B) chloroplast
C) chromosomes
D) nucleus
E) lysosome

The inguinal region is commonly known as the ________.

A) groin
B) buttock
C) breastbone
D) upper arm
E) navel

Beta waves

A) Usually occur in children or in adults experiencing frustration
B) Observed in a person who is awake, quiet, and resting, with eyes closed
C) Occur in deep sleep, infancy, and patients with brain disorders
D) Occur during intense mental activity

You are studying a fossilized primate skull and notice that the foramen magnum is located at the center of the base of the skull. You conclude that the skull belonged to a:

A) gibbon.
B) quadruped.
C) brachiator.
D) bipedal primate.
E) knuckle walker.