2. How does mass extinction affect species that survive?

A. There are no surviving species if a mass extinction occurs.

B. They will soon become extinct.

C. They combine gene pools.

D. They fill new roles in the changed environment.

What similarity do animals and plants share?

Dairy cows are selectively bred for larger udders to produce more milk. A disadvantage of this selective breeding is that these cows have difficulties producing more offspring.

In binary fission, the genetic material is pulled apart by

What will most likely happen if the plankton population decreases in this ocean system? a. salmon will completely disappear from the ocean. b. shrimp will have more difficulty finding food. c. there will be a fast growth in the shrimp population. d.

True or False: The amount of gravitational force, or pull, between 2 objects also depends on how far apart they are.

How many atoms lined up side by side would equal the thickness of a book page?

If an ambulance hits someone on the road while transporting someone to a hospital, do they bring that person with them too?

Cell biologists have introduced radioactively labeled carbohydrates, fats, and amino acids to living cells, allowed time for cell metabolism, and then placed the cells in a blender and separated out the various cell organelles from the cytoplasm.

Increased production of goods makes our lives more comfortable, but causes an increase in the demand for energy and other resources. One negative impact of this situation on ecosystems is an increase in

One of the most common causes of pneumonia is Streptococcus pneumoniae, a gram-positive bacterium. Surrounding the bacterium is a thick structural component layer known as a capsule.