A netlike array of leaf veins is typical of ________
a. either monocots or eudicots
b. monocots only
c. eudicots only
d. neither monocots nor eudicots
c
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Hummingbirds' small size allows them to hover while extracting nectar from various flowers. This same small size requires large amounts of calories to maintain body temperature because
a. the breeze from their flapping wings constantly cools them off. b. hummingbirds only eat at night. c. they have a large body mass relative to their surface area. d. hovering requires less energy than forward flight. e. they have a large surface area relative to their body mass.
The direct yield of ATP from the electron transport system is:
1.2 2.8 3.32 4.36 5.48
The atomic number is the number of
a. neutrons and protons. b. neutrons and electrons. c. protons and electrons. d. protons only. e. neutrons only.
A researcher lyses a cell that contains nucleic acid molecules and capsomeres of tobacco mosaic virus (TMV). The cell contents are left in a covered test tube overnight. The next day this mixture is sprayed on tobacco plants
We expect that the plants would _____. A) develop some but not all of the symptoms of the TMV infection B) develop the typical symptoms of TMV infection C) not show any disease symptoms D) become infected, but the sap from these plants would be unable to infect other plants