Biology Unit: Evolution and Isolation Quiz

Questions and Answers

How does biogeographic isolation allow for the change of gene pools over time?

Biogeographic isolation determines who will win competition for mates.

Biogeographic isolation causes changes in gene pools that result from populations being separated. (correct)

Biogeographic isolation determines the time that populations will breed.

Biogeographic isolation affects the random changes that take place within gene pools.

Which best describes a conclusion Henry might have reached regarding two populations of lizards affected by a hurricane?

Genetic drift greatly affects large populations, but small populations can recover.

Gene flow greatly affects large populations, but small populations can recover.

Gene flow greatly affects small populations, but large populations can recover.

Genetic drift greatly affects small populations, but large populations can recover. (correct)

Which type of selection leads to increased phenotypic and genetic variation?

Directional selection

Stabilizing selection

Disruptive selection (correct)

Species selection

What would be the best title for a paper showing different adaptations in separated deer populations?

Speciation by Geographic Isolation Signup and view all the answers

Which best describes biogeographic isolation?

It is a mechanism for evolution. Signup and view all the answers

Which finding led biologists to conclude that the phenotype of a dominant allele is not always the most common?

The discovery of populations in which the phenotype of the recessive allele helps a population survive. Signup and view all the answers

Which is the least supportive example of genetic variations affected by environmental changes?

Changes in genetics in human populations Signup and view all the answers

Which piece of evidence contradicts the idea that humans do not evolve because we adapt through technology?

The size of our brains has increased since humans started using tools. Signup and view all the answers

In four o'clock plants, if q2 = 0.169, what is the expected p value in the next generation?

0.589 Signup and view all the answers

What would most likely happen to the color of male cardinals if females change their mating criteria away from feather color?

Decreased variation in the shades of red over time because no form of the trait is advantageous. Signup and view all the answers

Why might Rick Potts's article not be the best reference?

The article may not reflect current knowledge. Signup and view all the answers

What can scientists attribute structural similarities between fossils of a land animal and an aquatic organism to?

Common ancestry Signup and view all the answers

Which of the following is an example of reproductive isolation?

Two populations of finches that cannot produce viable offspring. Signup and view all the answers

Study Notes

Evolution and Gene Pools

Evolution involves changes in gene pools within a population over time.
Biogeographic isolation leads to genetic changes due to populations being separated, affecting gene pool diversity.

Genetic Variation and Population Size

Small populations experience genetic drift more significantly than large populations.
A case study on lizards showed reduced genetic variation in a small island population after a hurricane, while the mainland population remained stable.

Types of Natural Selection

Disruptive selection increases phenotypic and genetic variation within a population.
Stabilizing selection and directional selection focus on enhancing certain traits, often reducing variation.

Speciation and Isolation

Geographic isolation can lead to speciation, as seen in a study where deer populations separated by a canyon adapted differently and became unable to interbreed.
Biogeographic isolation serves as a critical mechanism for evolution, influencing species formation.

Understanding Dominance in Alleles

Dominant alleles do not always predominate in a population; recessive phenotypes can thrive under certain conditions, demonstrating adaptive survival advantages.

Genetic Variations and Environmental Changes

Genetic variations in populations can be illustrated through antibiotic resistance in bacteria or changes in color in species like the peppered moth.
Examples of genetic variation linked to environmental changes showcase significant impacts, although changes in human genetics are less supportive of this concept.

Human Adaptation vs. Evolution

Technological adaptation does not negate human evolution; evidence like increased brain size over time contradicts claims of human static evolution.

Hardy-Weinberg Equilibrium

In a population of four o'clock plants in Hardy-Weinberg equilibrium, the expected p value can be calculated when given q2.

Natural Selection and Mate Selection

If female cardinals change their mate selection criteria away from feather color, male cardinal's red coloration variation is likely to decrease over time as no specific color becomes advantageous.

Environmental Variability and Human Evolution

Rick Potts' research indicates that variable environmental conditions have played a crucial role in human adaptability and evolution but may not reflect the latest knowledge in the field.

Fossil Similarities

Structural similarities between fossils of different species, such as land animals and aquatic organisms, are attributed to common ancestry rather than convergent evolution.

Reproductive Isolation Example

Reproductive isolation is exemplified by two populations of finches that cannot produce viable offspring, highlighting the importance of reproductive barriers in speciation.

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Description

Test your understanding of the concepts of evolution and biogeographic isolation in this biology unit quiz. Explore how isolation can influence gene pools and the overall evolutionary process. Perfect for students studying evolutionary biology.