A species of cactus has spines. How would biologists explain how a species of cactus with spines evolved from an ancestral cactus species without spines?

Enzyms are used for

What do pathologist do to determine the age of rocks

Which describes the F2 generation in Mendel's experiments? O A. Three times as many tall plants as short plants O B. The same number of tall plants and short plants O C. Half as many tall plants as short plants O D.

How is population growth likely to affect the supply of wind energy and its environmental effects?

When plants that are heterozygous for round seeds are crossed, what is the probability that the offspring will have wrinkled seeds? A 25 percentB 50 percentC 75 percentD 100 percent

Describe the environment in Madagascar

Example of a food chain of which fungi is a part?

Environmental manipulation can result in unforeseen consequences true or false

Why do some leaves turn yellow or orange in the fall? A) to attract beneficial insects B) because the chlorophyll pigment has broken down D) because the carotenoid pigment has increased

What is the main characteristic of eusocial groups?