What are blocks of time in the geological time scale called?

Which shapes do bacteria take? Check all that apply. pyramid rod cone spiral sphere star

What is a nucleotide made up of

Recent work in classification of life on Earth has shown that what were once called prokaryotes are much more diverse than ever suspected.

Why does a deep injury to the skin result in abundant scar tissue?

What occurs when some elephants in a population migrate into another are and join another population?

How long can food that requires time-temperature control be left in the danger zone? A. A maximum of 3 hours B. A maximum of 4 hours C. A maximum of 1 hour D. A maximum of 2 hours

Explain the characteristics of this soil sample that likely allowed Judy to make this identification. Include particle size and texture in your response.

Rick uses an electronic air sampler to determine the amount of dangerous chemicals in the air. Which functions of the air sampler confirm that it is an electronic tool? Check all that apply. It collects chemical data.

Prokaryotic cell lacks membrane - enclosed structure is called?

Humidity is water vapor in the air. Infer how plants contribute to humidity.