AnswersFL-2000310-Biology 1 BUnit Test

Darwin's Theory Answers

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According to the concept of “survival of the fittest," if a population of birds eats worms that they find deep under ground by using their beaks, which members of the bird population would be more fit?

A
birds that have flatter beaks
B
birds that have longer beaks
C
birds that have wider beaks
D
birds that have brighter beaks
2
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A frog has more offspring than can survive on available resources.Of which is this an example?

A
structural adaptation
B
overpopulation
C
variation in a population
D
artificial selection
3

Which best describes the relationship between evolution and natural selection?

A
Natural selection leads to evolution.
B
Evolution leads to natural selection.
C
Natural selection is the same as evolution.
D
Evolution and natural selection are not related.
4

In terms of natural selection, what is the best description of an organism that is fit?

A
The organism is physically stronger than competing organisms.
B
The organism is physically stronger than organisms of a different species.
C
The organism is better able to survive and pass on traits to offspring than competing organisms.
D
The organism is a member of a population in which every member survives without competing.
5

Which statement describes natural selection?

A
It is the primary mechanism for evolution.
B
It must act on structural traits.
C
It acts to cause overpopulation.
D
It causes learned skills to become heritable traits.
6

The map shows the allele frequency of sickled hemoglobin (HbS) and malaria endemicity in Africa. Which statement best explains the relationship between HbS allele frequency and malaria endemicity in Africa?

Question illustration
A
When an area is malaria free, the HbS allele frequency is between 0 and 4.04.
B
When an area is holoendemic, the HbS allele frequency is between 0.52 and 4.04.
C
When an area is malaria free, the HbS allele frequency is between 12.64 and 18.18.
D
When an area is holoendemic, the HbS allele frequency is between 0 and 0.51.
7

Consider this image of a gazelle.Which of the gazelle’s naturally selected traits is shown in this picture to be an evolutionary advantage?

Question illustration
A
feeding only at certain times of the day
B
coat color for blending in with dry grass
C
specialized gut due to a diet of grasses
D
specific gender roles to diminish predation
8

Which was Charles Darwin’s contribution to the study of biology?

A
He was the first person to recognize that organisms change over time.
B
He believed that organisms adapted through the inheritance of acquired traits.
C
He explained how traits are passed from parents to offspring.
D
He proposed that natural selection is the primary mechanism of evolution.
9

During a trip to the Galapagos Islands, which observation led Charles Darwin to suspect that organisms change over time?

A
Island finches were able to breed with mainland species.
B
Island finches resembled mainland finches, but were not the same species.
C
Island finches resembled extinct species from other islands around the world.
D
Island finches did not have beaks of the same size and shape.
10

Veronica wrote Charles Darwin’s main points on the board, but she made a mistake in one point.1. Since more offspring are produced than an environment can support, organisms within a population must compete for resources to survive.2. Due to variations within the population, some competitors will be better equipped for survival than others.3. The best-equipped organisms will survive and will produce well-equipped offspring. 4. Variations that help with survival will be passed on to future generations and will rapidly change the whole population.Which point is flawed as written above?

A
point 1
B
point 2
C
point 3
D
point 4

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