An organ system is a group of organs that

a. are made up of similar cells.

b. are made up of similar tissues.

c. work together to perform a specific function.

d. work together to perform all the functions in a multicellular organism.

All BUT ONE statement describes an advantage of meiosis. A) Variation is aided by crossing-over which occurs during meiosis. B) Meiosis ensures daughter cells receive one of each kind of gene and half the chromosome number.

4. How have modern scientists found additional support for Darwin's theory using genetics, molecular biology, and comparative embryology?

In vitro fertilization takes place in A. the uterus. B. a laboratory. C. the vagina. D. a surrogate mother.

Relatively uniform loss of color in leaves, occurring first on the older ones, is usually a sign of deficiency of which of the following? A. potassium B. iron C. nitrogen D. magnesium E. boron

How do small intestinal epithelial and root hair cells function in nutrient procurement?

1. In the list above, circle the word that means what a scientist changes in an experiment.

What is a sentence using Active Transport?

The wind-chill effect refers to the fact that exposure to a cold environment can cause frostbite. a. True b. False

The anther is supported by?

Your professor wants you to construct a phylogenetic tree of orchids. She gives you tissue from seven orchid species and one lily. What is the most likely reason she gave you the lily? a. to see if the lily is a cryptic orchid species b.