Stem cells in human bone marrow divide and differentiate to form various A) neurons. B) hormones. C) osteocytes. D) blood cells.

How do genes and environment interact?

Dark green or orange vegetables and/or fruits are recommended at least every other day to provide a source of

Which of the following releases energy? A. Nutrients entering a cell through the cell membrane B. Removing a phosphate group from an ATP molecule C. Building sugar or starch molecules for long-term energy storage D.

What is the difference between an embryophyte and a spermatophyte?

Explain the relationship between the environment, variation, and selection.

Plant cells can synthesize organic molecules and later break them down to extract that energy for performing life processes. These activities require direct interaction between the

Which of the following is a key element of naturalism

Jan noticed that when she put a tomato in water, it sank. When she put an apple in water, it floated. Why did the tomato sink while the apple floated?

an ___organism has different types of cells that are specialized for various functions. (fill in the blank)

What process reshuffles allele combinations between homologous chromosomes? a. genetic recombination b. asexual reproduction c. independent assortment d. mitosis