In which of the following organisms does blood flow from the pulmocutaneous circulation to the heart before circulating through the rest of the body?
A) annelids
B) molluscs
C) fishes
D) frogs
E) insects
Answer: D
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The chance of a child having albinism when both of his parents are heterozygous for the disorder is ____ percent
a. 0 b. 25 c. 33 d. 50 e. 75
All blood from small intestine capillaries flow
through the ___ to the liver.
a. renal vein b. renal artery c. hepatic portal vein d. hepatic portal artery e. bile duct
Malignant tumors are characterized by:
a. metastasis. b. abnormal cell growth. c. the formation of cell masses. d. specific mutations. e. proto-oncogenes.
Which of the following pairs is incorrectly matched for cells and the molecules they secrete?
A. Mast cells; histamine B. Natural killer cells; toxic chemicals C. Eosinophils; toxic chemicals D. Neutrophils; heparin E. Basophils; heparin