Which structures are part of the body's first line of defense against pathogens?

A.

white blood cells

B.

red blood cells

C.

lymph nodes

D.

mucous membranes

Explain why cells dont just contuinue to grow larger as organisms grow larger. why do cells divide?

Which activity would contribute the most to water pollution?

Pathogens cannot be passed from one individual to another through contact with infected blood. a. True b. False

A white cow and black cow produce an offspring with large areas of white coat and black coat? This is an example of

Membrane phospholipids have hydrophobic heads that face the center of the membrane and a. have hydrophilic tails that face outward and are exposed to water. b. are able to drift about in the plasma membrane. c.

What acid precipitation and two examples of the negative effects of air pollution.

The orbital cavities, nasal cavity, paranasal sinuses, and the oral cavity are all located in what region of the body

The process in which glucose is broken down and atp is made

What does the Calvin cycle do

Imagine that a researcher is comparing the sequence of several protein-coding genes among mice, rabbits, and humans. She finds that, for most of these genes, the rabbit sequences are more similar to the human sequences than are the mouse sequences.