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Item 3
What is another path carbon can take to enter ocean waters besides from the atmosphere?

Phytoplankton produce the majority of the oceans’ carbon dioxide.
Rivers pick up carbon from land and carry it to the oceans.
Rainfall carries carbon dioxide from the clouds.
Marine mammals produce most of the carbon dioxide when they breathe.

Next pretest: evolution select the correct answer in a laboratory population of flies, the female flies are gray and the males are yellowish gray. biologists observed that all the male flies had an equal chance for reproduction, but the male flies with the brightest colors were more likely to successfully reproduce. what phenomenon could explain such a change? a sexual selection b. disruptive selection c. stabilizing selection d. directional selection

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them

People with one sickle cell allele are not likely to get malaria. what is this an example of?