Which stage has the longest life expectancy?
A) ex = 0
B) ex = 1
C) ex = 2
D) ex = 0.5
C
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Potable water
A. is not suitable for human consumption. B. requires boiling to make it safe to drink. C. is suitable for human consumption. D. requires chemical or biological treatment to remove heavy metals.
What type of water-conducting cells has perforation plates on their ends?
a. tracheids b. vessel elements c. sieve elements d. companion cells e. sieve tubes
In general, communities that characterize a
biome are arrays of species that are adapted to a. specific temperatures. b. patterns of rainfall. c. soil type. d. each other. e. all of these
The tendency of bacteria to move away from a toxic substance or move towards a food source is ______________
Fill in the blank(s) with the appropriate word(s).