How does the carbon dioxide necessary for photosynthesis enter plants? a. through their roots b. through openings in the leaves called stomata c. the plants produce their own complete supply d. none of the above

Where does the process of protien synthesis take place

What kingdom contains true bacteria

According to the theory of natural selection, what will most likely happen to a species that exhibits variation in physical traits? A) the species will separate into many different species.

Which of the following mutagens causes mutations by creating thymine dimers? a. nucleotide analogs b. nitrous acid c. ultraviolet light d. benzopyrene e. gamma rays

Scientific notation is often used to express numbers. When is scientific notation more appropriate than standard notation? A) For numbers that contain fractions. B) For very large or very small numbers. C) For measured values during experiments.

To which organ system does the stomach belong too

Amino acids are used to bulid

What fruit contains the enzyme bromelian?

Hydrogen is the simplest element it has an atomic number of 1. There are three hydrogen isotopes: H1, H2, and H3. Explain how these isotopes differ with respect to their number of protons, neutrons, and electrons.

Beadle and Tatum used which of the following organisms to support their one gene - one enzyme concept? a. escherichia coli b. drosophila c. neurospora d. salmonella e. homo sapien