A molecular clock is based on ____
a. measurement of daylight by pigment complexes
b. daily changes in amino acid sequence in specialized proteins
c. regulation of gene expression
d. precise oscillations of atoms in a crystal
e. a constant rate of mutation in DNA sequences
ANSWER: e
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Which of the following is NOT a characteristic of "prediabetes"?
a. high levels of HDL, the "good" cholesterol b. "apple shaped" body c. blood pressure of 130/85 mm Hg or higher d. fasting glucose of 110 mg/Dl or higher e. fasting triglyceride level of 150 mg/Dl or higher
Triiodothyronine (T3) is secreted by the ____
a. parathyroid gland b. thyroid gland c. pancreas d. adrenal cortex e. adrenal medulla
A characteristic that is independently acquired by reversal or convergent evolution exhibits homology
_____________________ Indicate whether the statement is true or false.
An arthropod embryo has ________ germ layer(s)
A) no B) one C) two D) three E) four