Earth has had several mass extinctions throughout its long history. Which describes a mass extinction, but not background extinction?

A. Species go extinct because other species are better adapted to the environment.
B. Extinctions of many species drastically alter whole ecosystems.
C. Extinctions affect only species of large animals, and not small animals, plants, or microorganisms.
D. Species go extinct because their environment no longer supports then

Hybrid instruments that play sounds that are part sampled and part synthesized are known as:

Drag each tile to the correct location. match each trait that an organism displays to a reproductive strategy.

Aparent with freckles is crossed with a parent without freckles. the punnett square shows the possible genotypes and phenotypes of the offspring. which statement accurately describes the probability of phenotypes? a.the offspring are more likely to have freckles. b.the offspring are more likely to have no freckles. c.the likelihood of the offspring having freckles and not having freckles is the same. d.the likelihood of the offspring having freckles and not having freckles cannot be determined.