Prokaryotes are different from all other organisms in that their cells

a. lack nuclei.

b. have organelles.

c. have cell walls.

d. lack DNA.

Why are sea otters well suited for life in the kelp forest?

Why is a day on Mercury 58 days 15 hours and 30 min in earth time if Mercury orits the sun the fastest

Describe at least two ways in which some factories pollute the environment.

Which is an example of a producer? A) a duck swimming in a pond B) a sunflower in a sunny meadow C) rain falling from a cloudy sky D) a tiger crouching in the savannah

If a mutation occurred and cells no longer received a signal to stop reproducing, would occur.

As a mouse undergoes respiration, it produces lactate. This type of respiration can be classified as acidic alcoholic aerobic anaerobic

Which continent lies almost completely within the tropical zone?

Which phrase best summarizes the theory of evolution by natural selection? a. Only the strongest animals survive. b. Life must come from other life. c. Populations change over long periods of time. d.

Why are people now getting disease that were considered eradicated?

Which action could lead to foodborne illness from cross-contamination?