Which characteristic is necessary for natural selection to occur in a species?

Which of the following structures represents the sporophyte stage of the bryophytes? protonema antheridia capsule

Clarify why a scientist can never prove or disapprove a hypothesis but can only test it

Which of these is an environmental effect of farming A. soil erosion B. tempature increase C. natural disasters D. habitat succession

Water perpetually cycle's from the earth to the atmosphere and back. In the previous sentence what does perpetually mean? A. constantly B. frequently C. occasionally D. rarely

In which of the following situations is salinity highest? A. Sea ice is melting. B. A large river system empties into the sea. C. Evaporation exceeds precipitation. D. Precipitation is abundant.

What are some sources of oxygen

A longshore current flowing southwards along a coast will primarily transport sediments

How much does an elephant weigh?

Explain in your own words! The process of genetic engineering is?

Identify the steps of gene cloning.