Which of the following correctly lists a germ layer with the adult tissues it forms? (Select all correct choices.)
A. ectoderm: outer layer of the skin, bone,
posterior pituitary gland
B. mesoderm: muscle, bone, pancreas
C. endoderm: lining of the respiratory and
digestive tracts, liver
D. ectoderm: nervous system, cornea and
lens of the eye, kidney
E. mesoderm: bone, connective tissue, liver
C
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Which cell type ranges in size from about 10 - 100 µm, has 80s ribosomes, and has internal compartments bounded by membranes?
A. Bacteria B. Eukarya C. Archaea
Which combination of hormones causes the
gonads to secrete hormones?
a. estrogen and progesterone b. testosterone and oxytocin c. estrogen and FSH d. testosterone and LH e. FSH and LH
Which of the following is false regarding bronchitis?
a. It can result from chronic irritation of the ciliated lining of the bronchioles. b. Irritated epithelial cells decrease their production of mucus. c. Bacteria colonize the epithelial mucus. d. Early attacks are treatable. e. Fibrous scar tissue forms in chronic bronchitis.
The phytochrome Pr
A) is the active form of Pfr. B) absorbs far-red light. C) is inactive and absorbs red light. D) is very unstable.