succession occurs when you start with barren rock and no soil.

a. Primary

b. Secondary

c. Annual

d. All of these

This aquarium exhibits biotic and abiotic factors in an aquatic environment. one of the abiotic factors is

Need will mark ! which features are created by groundwater erosion and deposition? check all that apply. a. stalagmitesb. sinkholesc. rillsd. stalactites e. gullies f. rivers

The spermists believed that: the male made the only hereditary contribution to the offspring the male and female traits were blended in the offspring the female made the only hereditary contribution to the offspring the male and the female made equal contributions to the next generation