What type of lipid has four carbon rings and no tails?
a. fats
b. steroids
c. waxes
d. phospholipids
e. triglycerides
b
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What allows fetal hemoglobin to remove oxygen from maternal hemoglobin?
A. Fetal hemoglobin has an extra heme group. B. Oxygen is more soluble in fetal blood than maternal blood. C. Fetal hemoglobin has a higher affinity for oxygen than does maternal hemoglobin. D. Fetal blood contains twice as many hemoglobin molecules than maternal blood. E. Fetal hemoglobin molecules are much larger than maternal hemoglobin molecules.
Vacuoles for ingesting food and regulating their water balance are characteristic of
A. sporozoans. B. spirochetes. C. trypanosomes. D. algae. E. ciliates.
Secondary growth (thickening) arises from
__________. Fill in the blank(s) with the appropriate word(s).
Proteins digested by trypsin in the stomach are broken down to amino acids in
A. hydrolysis reactions. B. anabolic reactions. C. dehydration reactions. D. denaturation reactions.