1. Absolute ages are based on evidence from

a. key beds.

b. stratigraphy

c. index fossils.

d. radiometric dating.

Explain why programmed cell death (apoptosis) is important.

Describe the three stages of transcription: initiation, elongation, and termination.

Chemical weathering has little effect on: mica feldspar quartz basalt

The structures that project from the cell membrane

What would have happened if Avery had added an enzyme that digested all the nucleic acids to the mixture of heat-killed bacteria, added the mixture to harmless bacteria, and injected the mixture into mice?

The group of polar bears that live along the eastern coast of Russia makes up an organism.

Which is an example of acquisition of natural passive immunity? which is an example of acquisition of natural passive immunity?

Which of the following best describes how energy is transferred in a food web? A. A All energy is transferred to each level of a food web. B. B Energy flows from producers to one or more levels of consumers. C.

As relative humidity increases, what happens to hair?

Name four weathering is caused by