Why might it be important to the survival of a species that mutations to dna cause changes in organisms?

A particular virus with DNA as its genetic material has the following proportions of nucleotides: 20% A, 35% T, 25%G, and 20% C. How can you explain this result?

The features found only in plant cells, only in animal cells, or in both plant and animal cells:

How do carcinogens contribute to the development of cancer cells?

In a plant called jimsonweed, flowers can be white or purple. A jimsonweed plant with white flowers is crossed with a jimsonweed plant with purple flowers. All of the offspring have purple flowers.

The possibility of down syndrome increases as the mother's age increases because

When does a wheel and axle have a mechanical advantage greater than one?

What do cells need to do between divisions to make sure that a full set of dna gets passed on to each daughter cell?

True or false: The central nervous system allows us to sense the environment

Which of the following statements is false regarding root hairs? a. they are outgrowths of endodermal cells c. they increase the surface area of the root b. they are outgrowths of epidermal cells d. they absorb water and nutrients

Why is it critical to divide the chromosome number in half?