In the desert food web shown below, which of the following best describes the transfer of energy between the desert tortoise and the coyote? a) about 90 percent of the desert tortoise's energy transfers to the coyote. b) about 10 percent of the coyote's energy transfers to the desert tortoise. c) about 10 percent of the desert tortoise's energy transfers to the coyote. d) about 90 percent of the coyote's energy transfers to the desert tortoise.

Joe is breeding cockroaches in his dorm room. he finds that the average wing length in his population of cockroaches is 4 cm. he chooses the six cockroaches that have the largest wings; the average wing length among these selected cockroaches is 10 cm. joe interbreeds these selected cockroaches. from earlier studies, he knows that the narrow-sense heritability for wing length in his population of cockroaches is 0.6. a. calculate the selection differential and expected response to selection for wing length in these cockroaches. b. what should be the average wing length of the progeny of the selected cockroaches?

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?

Describe how a non-resistant staphylococcus aureus bacterium can produce a bacterium that is resistant to methicillin