Darwin's Theory Answers

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

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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
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Which would least likely be a cause of natural selection?

A
adaptation
B
evolution
C
overpopulation
D
variation
3

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
4

In the African savanna, more wildebeests are born than the environment can support. Which is most likely to happen over a period of years as a result?

A
The chances for survival of the population are reduced.
B
New food sources are discovered and become the regular diet.
C
Individuals that are well suited to the environment reproduce, and those that are not well suited die before they reproduce.
D
The environment adapts by providing more resources to the growing population, increasing the chances of survival for individuals within the habitat.
5

Natural selection is a process by which organisms that are better adapted to their environment tend to

A
increase in size.
B
migrate.
C
evolve new traits.
D
survive.
6

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.
7

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
8

Charles Darwin observed a unique beak size and shape in the finch population of each of the Galapagos Islands that he visited. Which is the most likely cause of the observed variation?

Question illustration
A
differences in the climate among the islands
B
competition among individuals for available food sources
C
competition among individuals for desirable mates
D
differences in egg size among the populations
9

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
10

Which organism exhibits behavioral adaptation?

A
an owl with large pupils and eyes that enable it to see better at night
B
a possum playing dead to increase its chances of survival
C
an insect that mimics its environment to hide from its predators
D
a desert plant that sheds its leaves to lessen water loss during the dry season

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