Answers24 - 25 CR - Biology B 0411KBFactors Affecting Biological Diversity-Standard Bio 4.4

Factors Affecting Biological Diversity-Standard Bio 4.4 — Unit test Answers

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In pea plants, purple flower color, C, is dominant to white flower color, c. The table shows the frequencies of the dominant and recessive alleles in three generations of peas in a garden. Generation 1 has 200 flowers, generation 2 has 400, and generation 3 has 400. Allele Frequency for Flower Color in PeasGenerationpq10.50.520.60.430.70.3Which best describes the number of flowers?

A
Generation 1 has more white flowers than generation 2.
B
Generation 3 has more white flowers than generation 2.
C
Generation 2 has fewer purple flowers than generation 1.
D
Generation 1 has fewer purple flowers than generation 3.
2
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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
always true.
B
usually true.
C
rarely true.
D
never true.
3

Consider the group of giraffes in the image below.Which statement about the giraffes explains their evolution based on Charles Darwin’s main points?

Question illustration
A
The closest fossil ancestor to these giraffes would have a very short neck.
B
All three of the giraffes have an equal chance of reproducing regardless of the environment.
C
As a giraffe reached for food, the giraffe could make its neck longer making it better adapted to the environment.
D
Long necks were a random genetic change and resulted in the gradual increase of organisms with long necks.
4

In rock layers, jellyfish fossils are found lower than trilobite fossils, and trilobite fossils are found lower than ammonite fossils. What can be determined from this information?

A
Trilobites existed before jellyfish and ammonites.
B
Jellyfish existed before trilobites and ammonites.
C
Ammonites existed before trilobites and jellyfish.
D
Jellyfish, trilobites, and ammonites lived together.
5

A primate species with a brain size of 1200 cc is discovered. From the information in the graph, what can be predicted about this species?

Question illustration
A
The species is closely related to modern humans.
B
The species was smarter than modern humans.
C
The species lived between 1.5 and 1 million years ago.
D
The species lived between 1 and 0.5 million years ago.
6

Fossils provide scientists with evidence that allows them to hypothesize how living organisms have evolved over time. Tiktaalik roseae was a unique organism that has been nicknamed the “fishapod” because it is believed to be a species had traits of both fish and tetrapods, the first four-legged animals.Which evidence would scientist use to make the connection between ancestry of fish and tetrapods using Tiktaalik roseae?

Question illustration
A
using transitional forms
B
using relative dating
C
studying decreasing complexity
D
studying analogous structures
7

Consider the brains of species A and species B to scale. Species A Species BSuppose that species A and species B have the same body size. Knowing this information, what can be determined from the pictures?

Question illustration
A
Species B is more intelligent and has a better memory than species A.
B
Species B can process sensory information more quickly than species A.
C
Species A is able to rationalize thoughts more effectively than species B.
D
Species A's brain is smaller for its body size than the brain of species B.

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