The Department of Energy is very interested in investigating which organisms compose the gut microbiome of cows, especially in the rumen. Why would the microbes within a cow's rumen be studied by scientists in the Department of Energy?
(Select all correct choices.)
A. Scientists want to derive biofuels from
cellulose.
B. Scientists want to derive biofuels from
methane.
C. Scientists want to derive biofuels from the
lactose in cow's milk.
A
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Using fetal DNA from the mother's blood for prenatal testing is a noninvasive procedure
a. True b. False Indicate whether the statement is true or false
Optometrists, who help patients with their vision problems, know that certain types of repetitive use of the muscles around the lens of the eye can "train" the lens to become flatter than normal
This often occurs in truck drivers, sailors, and other people who focus on the horizon or at great distances for long periods of time. What would be the consequence of this on the eye over a long time period? A) Nearsightedness B) Farsightedness C) Complete blindness D) Color-deficiency
Capillary action is one of the forces that aids water's upward movement in plants. The narrower the diameter of the tube, the farther the water column will rise. Capillary action is a result of water molecules
A. being associated with hydrophobic molecules, which can result in upward movement. B. having an adhesive force, which allows them to attach to the vessel walls. C. producing sufficient surface tension to overcome the pull of gravity. D. storing heat and thus moving faster because of heat of vaporization. E. having a strong cohesive force and attaching to the surrounding vessel walls.
The average mutation rate for DNA replication is 1 mutation for every 10 billion (10,000,000,000 ) nucleotides of DNA replicated. Yet DNA polymerase makes a mistake during replication at an average of 1 in 100,000 nucleotides. What does this say about
DNA replication? A) The base-pairing rules (A pairs with T and G pairs with C) prevent any mutations. B) Cells are extraordinarily proficient at repairing errors made during DNA replication. C) Most errors in DNA replication become mutations. D) Cells recognize that a small fraction of mutations are beneficial to organisms and do not repair those.