If a diploid tomato cell has 24 chromosomes, how many chromosomes will the tomato's sex cells have?

What advantage would there be for an organism to be able to turn on or off particular genes in response to certain conditions?

Radiation burns, which cause delayed, irreversible changes of the skin, can be caused by high doses of what form of ionizing radiation?

The body uses two types of amino acids: essential and nonessential. Which of the following statements about essential and nonessential amino acids is correct? There are 11 essential amino acids.

When an apple is cut, oxygen comes in contact with the fruit's inner tissue and browning occurs. One particular enzyme in the apple cells, polyphenol oxidase, begins breaking down the tissue.

Water is a solvent becaause it

The resistance of many bacterial species to antibiotics is an example of: stabilizing selection directional selection disruptive selection extreme selection

An amino acid sequence in whales for a protein shared by all organisms will be the least similar to the sequence in

Which of the following statements about water are true? Check all that apply. Water covers 75% of the Earth Once water is used it can never be reused. Only 3% of Earth's water is fresh water. Water comprises the majority of all plants and animals

How organisms could be harmed by high levels of salt from roadways, and expressing your opinion about whether it should continue and why.

If a wildfire occurs in a grassland, what would be a positive effect to the ecosystem