Which form of sea life is showing signs of decreasing in numbers?
a. carp
b. swordfish
c. sharks
d. blue fish
e. eels
C
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When a steroid hormone and a peptide hormone exert similar effects on a population of target cells, then _____
A) the steroid and peptide hormones must use the same biochemical mechanisms B) the steroid and peptide hormones must bind to the same receptor protein C) the steroid hormones affect the synthesis of effector proteins, whereas peptide hormones activate effector proteins already present in the cell D) the steroid hormones affect the activity of certain proteins within the cell, whereas peptide hormones directly affect the processing of mRNA E) the steroid hormones affect only the release of proteins from the target cell, whereas peptide hormones affect only the synthesis of proteins that remain in the target cell
Evolution at the genomic level involves changes in
A. chromosome structure and number. B. sequences of amino acids in proteins. C. sequences of nucleotides in RNA molecules. D. incorporation of new organelles such as the mitochondrion. E. DNA and histone relationships.
If formerly interbreeding organisms are prevented from the production of fertile offspring, _____ has occurred
a) geographic isolation b) behavioral isolation c) physiological isolation d) reproductive isolation e) punctuated isolation
Aerobic cellular respiration generates about ________ ATP from one glucose
A) 2 B) 6 C) 38 D) The number generated depends on whether the end product of aerobic respiration is lactic acid or ethyl alcohol.