A cell must expend energy to transport substance using

A. A cell membrane pump b. Facilitated diffusion c. Ion channels d. Osmosis

Two related species that live in the same area but mate during different seasons are separated by

What was one of the goals of the headright system? A. to give more power to the governor of a colony B. to centralize the government of a colony C. to increase the population of a colony D. to make a colony more democratic

How is the gender of a baby determined

The length of a planet's day is determined by its

What is overproduction? Some offspring mate with too many partners. Individuals produce offspring with too many traits. More offspring are produced than can survive. Some individuals produce more offspring than others.

What is the root cause of heat stroke?

7. There is a narrow opening from the Mediterranean to the Atlantic called the Strait of Gibraltar. During World War II, submarines would sneak quietly through the heavily patrolled strait by shutting off their engines.

Suppose scientists have 2 substances that look alike. how could they use density to see if they are the same substance?

Lysogenic bacteriophages contribute to bacterial virulence because bacteriophages kill human cells. carry plasmids. kill the bacteria, causing release of endotoxins. produce toxins. give new gene sequences to the host bacteria.

The organ of blank contains the sensory cells of the cochlea.