The extreme population phenotypes are favored by the environment.

Disruptional (Diversifying) Selection

A group of organisms that can mate with each other and produce fertile offspring.

A group of organisms that can mate and produce offspring even if those offspring are infertile.

A group of organisms that genetically are very different from each other.

Indivual organisms that live in the same environment.

What example of evolution has the biggest implications for the human population?

Flavobacterium nylonase production.

Changes in peppered moth wing camouflage

Which statement correctly explains how resistance to penicillin appeared after a few years of its widespread use to fight bacterial infection?

some bacteria were resistant to penicillin and their population spread rapidly, without competition from bacteria that were killed by penicillin

in order to survive exposure to penicillin, bacteria developed a resistance to the drug

a few bacteria became resistant to penicillin, and through sexual reproduction , most bacteria acquired the resistance

penicillin never really successfully wiped out populations of bacteria, scientist did not use proper controls in their studies

A new chemical was discovered and introduced into a culture containing one species of bacteria. Within a day, most of the bacteria were dead, but a few remained alive. Which statement best explains why some of the bacteria survived?

They had a genetic variation that gave them resistance to the chemical.

They were exposed to the chemical long enough to develop a resistance to it.

They mutated and became a different species after exposure to the chemical.

They absorbed the chemical and broke it down in their digestive systems.

Modern whales developed their traits through natural selection. What occurs during the process of natural selection?

Only the fittest organisms can survive and reproduce

Organisms choose mates from other species to create new species

Breeders selectively cross organisms with desired traits

Organisms remain exactly the same over time.

The example of the peppered (brown) moths living near English industrial cities demonstrates that

A change in an environment can result in the evolution of species living there

Evolution occurs so slowly that is it not possible to determine that it has happened in less than a million years

The environment near these cities has always favored dark colored moths

A population of plants live in a field. The plants lose water through their leaves. Their stems store water. What will most likely happen if the environment becomes drier?

After several generations, most of the plants will have thicker stems and smaller leaves

Each plant will evolve thicker stems and smaller leaves

After 1 generation, most of the plants will have very thin stems

Plants with larger leaves will be more likely to pass on their traits to their offspring

What is the greatest advantage of being a sexual organism?

All offspring are genetically different and can survive a new virus, bacteria or environmental change

All offspring are genetically identical and can survive a new virus, bacteria or environmental change

What are the five principles of natural selection?

variation, overproduction, adaptation, struggle to survive, and descent with modification

adaptation, artificial selection, overproduction, descent with modification, variation

homologous overproduction, adaptation, struggle to survive, and descent with modification

variation, overproduction, adaptation, struggle to survive, and gene flow

A virus killed most of the seals in the North Sea (e.g. dropped the population from 8000 to 800). In an effort to help preserve the species, scientists caught 20 of the remaining seals and used them to start a new population in the northwest Pacific Ocean. Which of the following statements would accurately describe the new population?

The new seal population is genetically less diverse than the original population

The new seal population is genetically more diverse than the original population

There is equal genetic variety compared to the original population

Which of the following cannot introduce new alleles into a population's gene pool?

All of the above introduce new alleles into the population

Natural selection and speciation

Authored by Lia Psillos

Biology

12th Grade

NGSS covered

Used 47+ times

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54 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Punctuated Equilibrium implies catastrophic events caused natural selection to speed up due to great environmental changes.

True

False

Tags

NGSS.HS-LS4-4

NGSS.HS-LS4-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Gradualism means Natural Selection would normally happen over many generations and very

slowly

quickly

in space

beyond time

Tags

NGSS.HS-LS4-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Over the years, white mice became extinct and darker mice survived. This is

stabilizing selection

directional selection

disruptive selection

due to exercise

Tags

NGSS.HS-LS4-4

NGSS.HS-LS4-2

NGSS.HS-LS4-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A physical trait favored by an environmental change can be called an

adaptation

extinction

possibility

mutation

Tags

NGSS.HS-LS4-4

NGSS.HS-LS4-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Average phenotypes are favored in the environment, while extremes have lower survival rates.

seasonal selection

distruptive selection

directional selection

stabilizing selection

Tags

NGSS.HS-LS4-4

NGSS.HS-LS4-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Two populations of the same species are separated by land barriers like rivers or mountains.

geographical isolation

temporal isolation

adaptive ratiation

behavioral isolaton

Tags

NGSS.HS-LS4-4

NGSS.HS-LS4-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Two populations of the same species do not have the same mating rituals or signals.

geographical isolation

temporal isolation

adaptive ratiation

behavioral isolaton

Tags

NGSS.HS-LS4-5

NGSS.HS-LS2-8

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Natural selection and speciation

Punctuated Equilibrium implies catastrophic events caused natural selection to speed up due to great environmental changes.

Gradualism means Natural Selection would normally happen over many generations and very

Over the years, white mice became extinct and darker mice survived. This is

A physical trait favored by an environmental change can be called an

Average phenotypes are favored in the environment, while extremes have lower survival rates.

Two populations of the same species are separated by land barriers like rivers or mountains.

Two populations of the same species do not have the same mating rituals or signals.

All the possible gene combinations in a population.

The frequency that single genes (alleles) for a trait appear in a population.

Changes in the gene pool over time.

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