An individual who responds to walking into an obstruction by pushing into it harder is exhibiting
a. negative phototaxis.
b. positive geotaxis.
c. negative thigmotaxis.
d. positive thigmotaxis.
c
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Choose the option that best describes the relationship between the cell wall thickness of parenchyma cells versus sclerenchyma cells
A) The cell walls of parenchyma cells are thinner than those of sclerenchyma cells. B) The cell walls of parenchyma cells are thicker than those of sclerenchyma cells. C) The thickness of the cell walls for both types of cells is roughly equal. D) The thickness of the cell walls for both types of cells is too variable for a comparison to be made.
In genetic mapping, a map unit is defined as:
A. the distance between two genes. B. 1 millimeter. C. 1 micrometer. D. the distance between genes resulting in 1% recombination. E. the distance between genes resulting in 50% recombination.
Biomes are defined by
A) their size B) plants, animals, and inorganic matter C) temperature and rainfall D) types of animals E) communities
You are the lucky student of a wacky professor who develops a time machine. He asks if you will test it with him. You get in and there is an immediate glitch–the date readout fails so that when you land you are not sure what era you are in
Your professor begins to panic, but you see something that tells you are in the Cenozoic era. Which of the following could it be? A) a rabbit eating a daisy B) a water lily floating in a pond C) masses of green ferns with dragonflies hovering above them D) a bee pollinating a flower