AnswersCMS 2026-2027 Biology CREDIT RECOVERYDarwin's Theory

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

A
He explained how traits are passed from parents to offspring.
B
He was the first person to recognize that organisms change over time.
C
He proposed that natural selection is the primary mechanism of evolution.
D
He believed that organisms adapted through the inheritance of acquired traits.
2
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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.
3

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 environment adapts by providing more resources to the growing population, increasing the chances of survival for individuals within the habitat.
B
The chances for survival of the population are reduced.
C
Individuals that are well suited to the environment reproduce, and those that are not well suited die before they reproduce.
D
New food sources are discovered and become the regular diet.
4

What is natural selection ?

A
a process through which nature selects an individual within a population for extinction
B
a process that selects variations that help with survival and that spreads the variations to more offspring
C
a process that causes all populations to gradually increase in size
D
a process that causes random variations to appear in the offspring of every generation
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
survive.
D
evolve new traits.
6

Which statement would least likely be used to describe variation?

A
Variations are inherited differences between individuals of the same species.
B
Variations may result in changes to an entire population after many generations.
C
Variations provide some individuals with an advantage.
D
Variations that decrease reproductive success are more likely to be passed on.
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 longer beaks
B
birds that have brighter beaks
C
birds that have flatter beaks
D
birds that have wider beaks
8

Populations of organisms that exhibit a high degree of variation have a greater chance for survival than populations of organisms that show little variation. This statement is

A
never true.
B
rarely true.
C
always true.
D
usually true.
9

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

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

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

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

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