Which is a reservoir for nitrogen?

A.

lightning

B.

biomass

C.

nitrogen gas

D.

ammonium

E.

nitrogen-fixing bacteria

What structures are found in plant cells that aren't found in animal cells?

How are the funtions of the cytoskeleton and cell wall different

A human cell that contains 22 autosomes and a Y chromosome must be (A) a zygote. (B) a somatic cell of a male. (C) a somatic cell of a female. (D) a sperm cell. (E) an egg cell

Why do people get fungus in their larynx?

Temperature is constant in the bathypelagic zone. True or false

True or False Individuals evolve by developing traits that are better for survival and reproduction

scientific knowledge is generally considered to have a positive effect on Society. and which situation would scientific knowledge most likely have a negative effect on society?

What index provides evidence of when different types of life evolved on Earth?

Which of the following is an input for cellular respiration? a. CO2 b. H2O c. sunlight d. O2

When is a plant considered a weed?