QUESTION 7 What scenario best illustrates the process of natural selection? a po
ID: 50700 • Letter: Q
Question
QUESTION 7
What scenario best illustrates the process of natural selection?
a population of mosquitoes develops resistance to a pesticide.
a chameleon's color changes to brown as it sits on a log
a population of foxes increases as more prey becomes available
a plant loses its leaves in a drought.
10 points
QUESTION 8
You are excited because you just purchased a male guppy that has red, blue and green colors on its fins and tail. Your guppies at home do not have this combination of colors. You place the new male in with three females for mating purposes. After three weeks you have many new baby guppies and with the new color combination. This is an example of which type of selection?
Natural.
Analagous
Convergent
Artificial
10 points
QUESTION 9
Which of these is NOT an example of molecular homology?
Use of DNA as an information storage molecule
The lack of an IGF-1 gene in prokaryotes.
Similarities among in the metabolic process for the break down of glucose.
The biochemical pathways for cellular respiration in plants and animals.
10 points
QUESTION 10
Which of the following pairs of structure are homologous?
wing of a dragonfly and wing of a hawk
wing of a bluejay and front flipper of a porpoise
a population of mosquitoes develops resistance to a pesticide.
a chameleon's color changes to brown as it sits on a log
a population of foxes increases as more prey becomes available
a plant loses its leaves in a drought.
Explanation / Answer
Answer 7- Option A
The development of resistance is due to genetic changes that supports the survival of the organism in adverse conditons. This is an example of natural selection.
Answer 8- Option D
This is an example of artificial selection as the humans are selecting the colorful male guppy for mating with the other non-color female guppies, to get possible variations. Here, man is the force of selection.
Answer 9- Option B
Rest all are the examples of comparing the two species with the help of the genetic material, metabolic process and pathways. IGF-1 gene absent in prokaryotes is not an example of molecular homology.
Answer 10- Option C
These two structures are similar in structure, thus these are the two homologous structures.
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