What makes up the greatest biomass of any species on Earth?
a. king crab
b. krill
c. squid
d. coral
e. sea cucumber
b
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The frequency of an electric razor in Europe that completes 50 vibrations in 1 s has a frequency of
A. 50 Hz with a period of 1/50 s. B. 50 Hz with a period of 50 s. C. 1/50 Hz with a period of 50 s. D. 1/50 Hz with a period of 1/50 s.
On land, the highest annual values for latent heat of evaporation (LE) occur
A) near the poles. B) over the subtropics. C) in the tropics. D) in the midlatitudes.
Flow in streams is always:
a. turbulent b. laminar c. both a and b d. neither a nor b
Organisms that feed through a food web instead of a food chain are more likely to survive because ________
A) food webs may contain organisms from different trophic levels B) there is more biomass in a food web than in a food chain C) if a member of the food web diminishes in availability, there are still many other things to eat D) the variety of food in a web is healthier so the organisms are more likely to live a long time