Nucleic acid contains
a. sulfur.
b. nitrogen.
c. potassium.
d. iron.
e. manganese.
b
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Variation arises in asexually reproducing populations by ________
a. mutation b. all of the choices c. natural selection d. recombination
During the third phase "3", the population
growth slows and then levels off because
a. essential resources become scarce. b. the carrying capacity has been reached. c. competition for food becomes increasingly important. d. predators eat fawns as they are born. e. all of these occur except "predators eat fawns as they are born."
Answer the following statements true (T) or false (F)
1.The two main branches off the trachea are called bronchi. 2.Filter feeders are autotrophs. 3.Cows are ruminants that rely on fermenting bacteria to break down plant matter. 4.The stomach organ produces amylase to aid in starch digestion. 5.When a single-celled ciliate protist engulfs a food particle through its mouth-like oral groove, it is performing extracellular digestion.
Which graph shows that species diversity is
much less at the equator than at 60 degrees north latitude? a. A b. B c. both d. neither e. not enough data is provided to answer the question