Erythropoietin (EPO) is mainly released by the kidneys in response to hypoxia (low levels of tissue oxygen). Consider homeostasis: Which one of the following effects is associated with increasing levels of EPO?

Structurally and functionally, this gland is often described as two glands in one; its cortex produces more than twenty steroid hormones, and its medulla synthesizes the catecholamines epinephrine and norepinephrine. This description matches that of the ______________________.

___ refers to a variety of a language distinguished by variations of accent, grammar, or vocabulary.

Humans have only ~21,000 genes yet produce ~100,000 proteins. How is this possible?

The term, ____, refers directly to numerical data.

The pedigree above traces the inheritance of sickle cell anemia, a blood disorder caused by a recessive allele (h) of the hemoglobin gene. Affected individuals, indicated by the filled-in circles and squares, produce abnormal hemoglobin, which causes red blood cells to become misshapen.   What is Carla’s genotype?

Which stage of cellular respiration generates the most ATP?

What is the structure labeled #3?  

During translation, there are two tRNAs bound by the ribosome.  Which of the following statements is true?

Mendel’s law of independent assortment says that ___________.