Experimental manipulation to increase the energy output of the cell might include

A) rupturing the lysosomes in the cell.
B) increasing the number of mitochondria.
C) decreasing nuclear size.
D) removing some of the ribosomes.
E) increasing protein synthesis.

An election to determine whether a union will be certified as the bargaining agent of a given group of employees is known as a _______________________________.

An MHC class II/antigen complex on the surface of an antigen-presenting cell (APC) binds to a T-cell receptor. What results from this interaction?

A) Other immune cells are inhibited.
B) The antigen is phagocytized by the T cell.
C) The T cell responds by directly destroying the APC.
D) Other immune cells are stimulated to respond to the antigen.

The simplest cephalization occurs in ____.

A) sea anemones
B) planarian flatworms
C) octopuses
D) vertebrates
E) grasshoppers

Systemic acquired resistance begins when an infected tissue releases small molecules that travel to other parts of the plant, where they trigger cells to produce a plant hormone called ____.

A) hydrogen peroxide
B) nitric oxide
C) salicylic acid
D) progesterone
E) cytokinin

Why are plant leaves green?

A) They absorb only green wavelengths of light.
B) They absorb only yellow and blue wavelengths of light.
C) They reflect nearly all wavelengths of light.
D) They reflect green wavelengths of light.
E) They reflect yellow and blue wavelengths of light.