An interruption in the normal breathing cycle at night is classified as ____________________. Fill in the blank(s) with the appropriate word(s)
ANSWER: sleep apnea
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Refer to the metabolic pathway illustrated above. If A, B, and C are all required for growth, a strain mutant for the gene-encoding enzyme B would be able to grow on medium supplemented with _____
A) nutrient A only B) nutrient B only C) nutrient C only D) nutrients A and C
Because they lack well-defined and complex organ systems, we hypothesize that ___ diverged from other animals
A. poriferans B. cnidarians C. choanoflagellates D. bilaterians
Which of the following is not typically a modification of histones?
A. adenylation B. phosphorylation C. methylation D. acetylation E. adenylation and phosphorylation
Multicellular organisms such as humans could be thought of as populations of cells, where each member of the population is derived from a single ancestor: the zygote. In such populations, we would expect to see that ________
A) all of the cells of the population are genetically identical, since they are derived by mitosis from the zygote B) mutations can occur, but only in cells that develop into tumors C) mutations could occur in any cell, and if so, they may be still be capable of division, leading to cells with heritable genetic variation D) mutation events that lead to increased cell survival or more rapid reproduction could, in effect, develop into tissues which evolve by natural selection within the organism E) Both C and D are possible outcomes.