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Population Dynamics and Natural Selection in Evolutionary Biology

Population Dynamics and Natural Selection in Evolutionary Biology

Assessment

Interactive Video

Biology, Science, Other

9th - 12th Grade

Practice Problem

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial explores various patterns of evolutionary change at the population level. It begins by defining a population and explaining genetic drift. The tutorial then delves into different types of natural selection: directional, stabilizing, disruptive, and frequency-dependent selection, providing examples such as elephant seals, human birth weight, fish species, and phenotypic advantages. Each selection type is illustrated with real-world examples to demonstrate how genetic changes occur within populations over time.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What defines a population in evolutionary terms?

A group of the same species that interbreed

A group of species that do not interact

A group of species that share the same habitat

A group of different species living in the same area

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is genetic drift?

A process where genetic changes occur due to natural selection

A process where genetic changes occur due to mutations

A process where genetic changes occur due to random events

A process where genetic changes occur due to environmental changes

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In directional selection, what happens to the population's traits over time?

They shift towards one extreme

They become more diverse

They become less diverse

They remain stable

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of directional selection?

Bird beak size

Human birth weight

Fish coloration

Elephant seal size

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is stabilizing selection?

Selection that favors one extreme

Selection that favors the average traits

Selection that favors rare traits

Selection that favors both extremes

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How has modern medicine affected human birth weight in terms of selection?

It has stabilized the birth weight

It has broadened the range of birth weights

It has decreased the average birth weight

It has increased the average birth weight

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is disruptive selection?

Selection that favors the average traits

Selection that favors one extreme

Selection that favors both extremes

Selection that favors rare traits

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