A person jumps after touching a hot surface. Which layer of skin was responsible for stimulating the person's response?

Carbon dioxide in the atmosphere enters the biotic parts of the biosphere through ... ?

All of the following have an internal skeleton except a. sand dollars. b. sand fleas. c. sea stars. d. sea lilies.

What does the ocean do to the CO2 in the atmosphere?

Drosophila (fruit flies) usually have long wings, but mutations in the BT gene can result in bent wings and mutations in the VG gene can result in vestigial wings.

Describe the specific dna changes that produce the abnormal sickle cell hemoglobin

1. An example of an organism that has an incomplete digestive system is a. a sea star. b. a sponge. c. a spider. d. a sand dollar.

Does eubacteria live in extreme or normal environment

A freshwater plant is placed in salt water. Which of the following events would most likely occur? Group of answer choices an increase in the action of its contractile vacuole shriveling of the cell swelling of the cell until it bursts swelling of

During what geological period do the angiosperms become more common?. A. Triassic. B. Permian. C. Jurassic. D. Cretaceous

Residential construction is expanding in Florida, the expansion has caused fragmentation of habitats, one of the results of the increased construction is a decrease in the number of large predators such as the coyote, black bear and pool panther,