Primary consumers eat
a. producers
b. secondary consumers
c. decomposers
d. tertiary consumers

What is thought to have caused the mass extinction at the end of the cretaceous period?

Do you think the gene eef1 alpha1 supports cell theory? explain your response.

What process decreases the salinity of ocean water? decreased precipitationdecreased melting of glaciersincreased evaporationincreased runoff from rivers