The clearing of forests for construction and the pollution of ecosystems are both examples of

natural ecosystem changes.

sudden climate change.

nonnative species introduction.

human habitat destruction.

Which of these does NOT refer to a genotype of an organism? homozygous dominant recessive gamete

Cell membranes perform all the following functions except- A) Making nutrients for cells B) Holding cytoplasm within cells C) Regulating substances exiting cells D) Recognizing other cells

The reason for a "blind spot" in the visual field is that

Which description is a characteristic of r-selection strategy? A. most offspring reach adulthood B. reaches reproductive capability after several years C. possesses low parental involvement after fertilization D. has a long life span

What is morphology? A. the study of differences in body forms B. changes in a population's gene pool C. the ability of organisms to interbreed D. the study of body biochemistry

Which is an ion found in a glass of water? A. H+ B. N+ c. O- D. O2

As air moves away from the tropics and toward the poles, it becomes A.) Cool and dry B.) Cool and moist C.) Warm and dry D.) Warm and moist

Which factor affects the amount of runoff that occurs in an area?

What does a dehydrogenase enzyme do? a. creates a new bond by removing a carbon b. inserts a water molecule into a bond to cut it c. moves a chemical group to another site in the same molecule d.

How does earths atmosphere support life