Which of the following is considered a second-line defense?

A. circuatory

B. digestive

C. nervous

D. respitory

Why is it necessary for the revised options gpo to appear first in the list?

Margination refers to Margination refers to dilation of blood vessels. the movement of phagocytes through walls of blood vessels. the chemotactic response of phagocytes. adherence of phagocytes to the lining of blood vessels.

Is this statement true or false? humans use special body parts for functions such as breathing and breaking down food. some living things, such as bacteria, are too small to perform these functions.

Which nitrogen base replaces thymine (t) in rna?

Fungi, such as mushrooms and molds, get their nutrition primarily by

Which organism's are omnivores? A) The snake, the bear, and the fish B) The fish and the eagle C) The bear and the fish D) The snake and the mouse If an omnivore is an animal that eats both plants and animals, I'd choose D because all the other

How are all humans similar?

Why does earth have such a diversity of plant and animal life? give three reasons.

After sequencing a molecule of dna, you discover that 20% of the bases are cytosine. what percentage of the bases would you expect to be thymine? explain why.

Kidneys that can conserve water are essential to homeostasis because: a) some animals live in dry or salty environments. b) some animals drink water.