The Irish elk was misnamed because it was neither exclusively Irish, nor was it an elk. The
Irish elk is a giant extinct deer, the largest deer species ever, which stood up to 7 feet at the
shoulder. In sexually mature males, the antlers spanned up to 12 feet and weighed 90 pounds.
These large antlers were likely used in displays and ritual combat between males during the
mating season. Although females preferred males with large antlers, these structures were also
unwieldy and may have lead to decreased survivorship in males. Thus, this trait arose through
the process of __________.
a. natural selection
b. sexual selection
c. mutation
d. gene flow
B
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Which of the following statements is TRUE?
A. The leading strand is replicated continuously for the entire length of the chromosome, e.g. while the lagging strand has multiple origins of replication. B. The lagging strand is synthesized in a semiconservative fashion while the leading strand is synthesized in a conservative fashion. C. Synthesis of the lagging strand requires more DNA helicase enzymes than synthesis of the leading strand. D. The lagging strand has a higher mutation rate than the leading strand. E. None of these are true
The three domains of life are ____
a. eukaryotes, prokaryotes, and viruses b. animals, plants, and microorganisms c. Prokaryota, Eukaryota, and Protostista d. Archaebacteria, Eubacteria, and Eukaryota e. Archaea, Bacteria, and Eukarya
In the human body, alcohol dehydrogenase (ADH) converts alcohol to ________
a. CO2 and H20 b. pyruvate c. acetaldehyde d. acetate
Much of the control of the digestive system originates in the neuron networks of the submucosa
Indicate whether the statement is true or false.