Refer to Figure 47-1. Nerves would be located in the part labeled as number:
a. 2 only
b. 3 only
c. 4 only
d. 2 and 3
e. 3 and 4
E
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In which cellular organelle does photosynthesis take place?
a. rough endoplasmic reticulum b. Golgi bodies c. mitochondria d. chloroplasts e. lysosome
A ?-pleated sheet is a type of
A) primary structure found in a protein. B) secondary structure found in a protein. C) tertiary structure found in a protein. D) quaternary structure found in a protein. E) heme structure found in a protein.
Marine cartilaginous fishes overcome water loss to their environments by:
a. having specialized chloride cells in their gills that prevent water loss. b. having specialized chloride cells in their gills that continuously excrete salts. c. storing urea in their body fluids, which causes them to be hypertonic to seawater. d. producing very small quantities of urine. e. drinking large quantities of freshwater
The movement of 25-year-old fertile individuals between Mexico and Canada will eventually contribute to:
a. mutation. b. gene flow. c. genetic drift. d. natural selection. e. directional selection