A structure that seems to serve no purpose in an organism is called: A. homologous B. vestigial C. dichotomous D. fossilized

Term Definition 3. Carbohydrate a. Molecule that's a source of energy in the body 4. Nucleic acid b. Many structures and enzymes in the body are made of these 5. Lipids c. One substance that makes up cell membranes 6. Proteins d.

Albinism is an autosomal recessive disorder. Two parents with normal pigmentation have an albino child. What is the probability that their next 4 children will consist of two albinos and two with normal pigmentation, in any order?

Evaluation of a system provides new information also known as: a) Input b) Process c) Output d) Feedback

How many DNA molecules would there be after four DNA molecules unzip and replicate?

Steroid hormones are large communication molecules that are modified cholesterol molecules. How do you think they enter a cell?

Which type of cytoskeletal element is described as a solid

Energy related usage in the United States makes up nearly what percentage of human-caused greenhouse emissions? A 57% B 63% C 72% D 85%

One function of the chromosomes in a cell is to A. absorb light and create energy for the entire organism. B. transport proteins throughout the cell and to other cells in the body. C. provide a location for protein synthesis inside the cell. D.

Consider the Ras signal-transduction pathway. Suppose a mutation occurred in the gene that encodes the transmembrane receptor to which a growth factor binds. The mutation no longer allows the growth factor to bind to the receptor.

Which of these have prokaryotic cells? A. snails B. bacteria C. frogs D. food