What event that occurred around 10,000 years ago led to genetic changes in wheat?
A) domestication of the wheat plant
B) domestication of livestock
C) invention of genetic engineering
D) mass extinction of herbivores
Answer: A
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Which of the following pairs are NOT homologous?
A. the wing of a bat and the front flipper of a whale B. the wing of a bat and the wing of a chicken C. the foreleg of a turtle and the front flipper of a whale D. the wing of an insect and the wing of chicken E. both the wing of an insect and chicken and the wing of a bat and chicken
You want to experiment with microbial growth in various nutrients, so you inoculate a loopful of E. coli into a tube of honey. Which statement best describes what you expect to happen and why?
A. E. coli grows well in the honey because fructose is a good carbon source. B. E. coli do not grow because there is only sugar in the honey and no other nutrients. C. E. coli will not grow because the excessive sugar is toxic. D. E. coli does not grow because it has been dehydrated by the honey.
Passive transport across a membrane refers to
a. transport into the interior of a cell. b. transport out of a cell. c. transport in the energetically favorable direction. d. simple diffusion across membranes, without the help of proteins such as channels or carriers.
What determines whether or not genes located on the same chromosome can assort independently?
a) Genes located on the same chromosome always assort independently. b) Whether or not independent assortment occurs is due to random chance. c) The distance between genes located on the same chromosome determines whether or not they can show any level of independent assortment. d) Genes located on the same chromosome can never assort independently. e) The phenotype decides what that the gene will express.