Please answer all! Thank you! Livestock production in the U.S. today uses nearly
ID: 82955 • Letter: P
Question
Please answer all! Thank you!
Livestock production in the U.S. today uses nearly 3 times as many antibiotics as are prescribed for all human patients. It is most likely that routine use of antibiotics in animal feed will result in:
a. an effective, long term way to eliminate disease-causing bacteria in the animals and therefore increase food production.
b. the animals developing resistance to the antibiotics.
c. an increased number of antibiotic-resistant bacterial strains.
d. the elimination of viral infections and thus increased food production.
e. ever fewer disease-causing bacteria in the environment
Examples of adaptive radiation of species would be easiest to find:
a. near nuclear power plants.
b. in isolated regions with many diverse habitats.
c. on mountain tops exposed to higher UV radiation.
d. in moist, humid tropical rainforests.
e. in areas with much human contact.
12. Theodosius Dobzhansky once stated: "Nothing in biology makes sense except in the light of evolution." Support for this statement is provided by:
a. genetics
b. molecular biology
c. physiology (e.g. photosynthesis and respiration)
d. ecology
e. all of the preceding
Which of the following did NOT occur to Darwin on the voyage of the Beagle?
a. He read Lyles Principles of Geology
b. He observed living animals and similar fossils
c. He read Malthus’ Essays on Population
d. He witnessed an earthquake and the resulting fault
e. All of the above DID occur on the voyage.
At the beginning of western settlement millions of buffalo lived on the Great Plains. By 1890 only about 750 survived in the entire country. This is an example of:
a. a severe mutation
b. negative gene flow
c. the founder effect
d. a genetic bottleneck.
Explanation / Answer
1. B.
The microbial strains develop resistance against particular antibiotics.
2. B
Adaptive radiation is the tendency of a group of animals to evolve in response to selective pressures and adapt to their environments in different ways.
3. E
Theodosius Dobzhansky Established the field of population genetics. Gradual Evolution, Speciation, and Macroevolution. "Nothing in biology makes sense except in the light of evolution."
That means evolution is the big underlying theory that holds all of biology together and unifies it. Evolution explains why biological organisms are as they are or do what they do. If you did not have the Theory of Evolution, you would have a lot of random facts. Evolution connects the dots.
4. C
In 1836, after returning from his 5 year voyage on the HMS Beagle, Darwin read Thomas Robert malthus essay on population which was first published in 1798.
5. D
A genetic bottleneck is a sharp reduction in the size of population due to environmental events such as earthquakes, fires, floods, diseases droughts are human activities.