The genetic code is:
A. different for bacteria than for eukaryotes.
B. ambiguous.
C. redundant.
D. a quadruplet code.
E. comprised of codons which usually differ at the first position.
Answer: C
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Nitrogen is made available to plants for their use by the process(es) of ____
a. ammonification only b. nitrification only c. nitrogen fixation only d. ammonification and nitrification only e. ammonification, nitrification, and nitrogen fixation
How do fossils support the theory of common descent?
A) They are a record of some intermediate types of organisms that document the process of evolution. B) They can be easily and precisely dated by comparing the rock layers where they are found. C) They are found equally all over the world, so they explain all our questions about biogeography. D) They contain complete DNA genomes, so they can be compared to modern organisms.
Below are figures for the percentage allocation of production to shoots (above-ground parts) for four different species. Which of these is likely to be an annual herbaceous species?
A) 80-90% B) 70-80% C) 60-70% D) 20-60%
What group of evolutionary biologists tends to focus on the differences between fossils, classifying Homo fossils into four or more species?
A. Bipedalists B. Splitters C. Lumpers D. Hominoids E. Formulationists