In what substance is nitrogen an important element? A. Proteins B. Carbohydrates C. Sugars D. Fats and lipids

Which is a disadvantage of asexual reproduction? mutation accumulation genetic variation slow reproduction process mate required

The karyotype for trisomy 21 illustrates an example of a genetic mutation caused by A) insertion. B) inversion. C) crossing over. D) nondisjunction.

An ecological community is defined as a group of actually or potentially interacting species living in the same place. A community is bound together by the network of influences that species have on one another.

The internal cytoskeletal structure of cilia and flagella grows out from a structure called a basal body located at the cell surface. Based on this information, where would you predict the plus end of the microtubules to be located? a.

Which of the following is a key a function of the glial cells?

Is the following sentence true or false? Herbaceous stems are hard and rigid and have an outer layer called bark

Which of the following is a product of photosynthesis? a. sugar b. carbon dioxide c. water d. light

These muscle cell could be best called

Amino acids are processed by the liver. Describe this process.

Which term names two chromosomes that look alike under a microscope?