Which best describes bacterium

A. A type of virus

B. A unicellular prokaryote

C. The shell surrounding a pilus

D. A particle that attacks viruses

Hypothesis A: If heart rate is related to caffeine intake, then coffee drinkers will have higher heart rates.

Which is a structure that directs the cell's activities? O nucleus O Golgi apparatus O ribosome O mitochondrion

A male cardinal's red color is an example of a trait affected by natural selection. The females of the based on the vibrant colors of the males' feathers.

Scientists conduct experiments to collect evidence. Which of the following is the best definition of the word experiment as used by scientists? A. the formation of a hypothesis B. making a series of observations C.

Does viruses have liquid cytoplasm

Why are the nerves that take information from our world called sensory neurons?

Explain the effects of radiation on the cellular process of mitosis and meiosis

A biome that has a large amount of rainfall, high temperatures, and a poor soil is a

When a ball is rolling down a hill sketch and label the forces that pull the ball down and the forces that slow the ball done

How are babies made ... Asking for a friend