The bones of a bird's wing are similar to the bones of a bat's wing. This observation is an example of _____
a. uniformity
b. evolution
c. comparative morphology
d. a lineage
C
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Which of the following is NOT a fate of glucose entering the body during the absorptive state?
A. used as fuel immediately by body cells B. stored as glycogen in the liver C. stored as glycogen in muscles D. converted to triglycerides and stored in fat cells E. converted into the hard extracellular matrix of bone
Answer the following statements true (T) or false (F)
1. The fast block to polyspermy occurs through a rapid increase in cytosolic calcium within the egg. 2. The sperm and its DNA enters the egg through simple diffusion through the egg plasma membrane. 3. The cortical reaction prevents multiple sperm from contributing their chromosomes to the egg. 4. The endoderm is a germ cell layer that tends to cover the embryo.
Receptor-mediated endocytosis:a
is a passive process. b. involves only membrane transport proteins. c. brings about the selective uptake of materials by enclosing them in membranous vesicles. d. does not require energy. e. is most likely to be found in cells that release large amounts of hormones.
Which of the following produces ATP via the electron transport chain?
A. aerobic respiration B. anaerobic respiratio C. fermentatio D. glycolysis E. Photosynthesis A. A, B and C B. C, D and E C. A, B and E D. A, B, and D E. A, B, C, and E