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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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.
3

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.
4

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.
5

What is natural selection?

A
a process that selects variations that help with survival and that spreads the variations to more offspring
B
a process through which nature selects an individual within a population for extinction
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
6

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
7

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.
8

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
9

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.
10

Koalas are marsupials that are found in eastern Australia. Although their ancestors lived mostly on the ground, modern koalas spend most of their time in eucalyptus trees. This is possible because their hands and feet have strong claws and opposable digits.What other adaptation could have helped koalas as they evolved from land dwellers to tree dwellers?

Question illustration
A
the ability to have several offspring at one time
B
fur color that closely matches the eucalyptus bark color
C
longer hind legs that allow for faster running
D
better ability to communicate with their peers

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