Which of the following best describes the endosymbiotic theory?
a. Aerobic respiration is more efficient than anaerobic respiration.
b. Prokaryotes evolved to live side by side with eukaryotes.
c. Eukaryotes are the result of one prokaryotic cell engulfing another.
d. Mitochondria can only live inside a eukaryotic cell.
c. Eukaryotes are the result of one prokaryotic cell engulfing another.
The theory of endosymbiosis states that eukaryotes evolved by engulfing other cells, which gave rise to organelles such as mitochondria and chloroplasts. It does not specifically refer to mitochondria alone.
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Which of the following is a characteristic of nematodes?
a. Having nerve cords along the body b. Having a segmented body c. Having an incomplete digestive system d. Having a specialized excretory system
A structure whose secretions cause the uterine endometrial tissue to thicken in preparation for
pregnancy is indicated by the label
a. 1. b. 2. c. 3. d. 5. e. 7.
During pregnancy, a maternal antibody transported across the placenta to the fetal bloodstream can cause a problem if
the mother ____. a. has passed on any teratogens b. and baby have different Rh factors c. is producing HCG d. smokes during pregnancy e. uses alcohol during pregnancy
Iodized salt provides the essential nutrient iodine. Iodine is important in preventing
A) menstrual cramps. B) a goiter. C) high blood pressure. D) gigantism. E) diabetes.