A hypothetical population has two alleles for a gene: a and

a. in a random sample of 50 individuals, 20 are homozygous for a, 10 are homozygous for a, and 20 are heterozygous. what is the frequency of a?

Enzyme deficiencies that affect the fatty acid β-oxidation pathway are often diagnosed by examining the different metabolic intermediates in the bloodstream.

What was the first microbial genome completely sequenced? Group of answer choices Haemophilus influenza Streptococcus pneumonia Mycobacterium tuberculosis Bacillus subtilis

As a final exam question in your biology course, you are asked to identify an animal that you immediately recognize as a chordate. Your instructor applauds you for your quick recognition of the phylum, but then he asks you to be more specific.

What is the outermost structure that surounds and supports plant and fungal cells?

A star begins with a mass 8 to 20 times that of the Sun's mass will do what

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