5e- Changes and Survival Review

Match

Match the following statements with the correct words.

• biodiversity

• ecological

• Genetic

• Surviving

• Species

The variety of life found on Earth.

This type of diversity refers to the ways that species interact with each other & their environment

This type of diversity is the variation in genes within a species.

Organisms with a large gene pool have a great chance of ____ than a population w/limited variability

This type of diversity refers to the number of species & abundance of species in a particular place

• The variety of life found on Earth.

• This type of diversity refers to the ways that species interact with each other & their environment

• This type of diversity is the variation in genes within a species.

• Organisms with a large gene pool have a great chance of ____ than a population w/limited variability

• This type of diversity refers to the number of species & abundance of species in a particular place

​Different DNA means some organisms have the ability to fight disease better.

Disease

​As environments change, some organisms will be able to adapt to their new environment easier

Climate Change​

​

​Different DNA means some organisms will be able to survive their predators better.

Predator Survivability

Before the industrial revolution, most moths were white and speckled black. Only some were black

1848

This white and black speckles gave them camoflauge on trees

​​1848

As the Britshed burned coal, their buildings and trees turned black and so did the moths.

​​1900

Why did the white ones start to disappear?

​​1900

​Black Peppered Moth

Multiple Choice

Why did the white ones start to disappear?

• The coal turned the white moths black

• They are actually different species and the white ones went extinct

• The white ones got a disease that the black ones didn't

• Predators ate the white ones at a higher rate.

​Because some of the moths had different DNA variations, their population was able to survive as their environment changed.

Genetic Diversity

The Balance of the Ecosystem

Ecosystems maintain balances so that all the organisms within the ecosystem can survive.

These balances involve

1. food

2. water

3. oxygen

4. nitrogen

5. carbon​

​

The sun provides the energy needed by ecosystems. Plants take this energy and use photosynthesis to create sugar which they can use for energy.

Nutrients in teh soil, the air, and water also play a part in keeping the ecosystem thriving and in balance. ​

​

Multiple Choice

What does the sun do for an ecosystem

• It creates oxygen

• It provides the permanent disappearance of species

• It provides energy

• It freezes the ground

Multiple Choice

Ecosystems maintain balances so that all the organisms within the ecosystem can survive.

These balances involve

• food

• water

• oxygen

• All of these

Multiple Choice

Why does biodiversity contribute to a habitat’s sustainability?

• The more plants and animals in a habitat, the greater the biomass, which is how habitats store energy.

• The greater the number of species, the more competition there is for food between predators, which sustains their populations

• Changing conditions that harm one species leave other species to survive and perhaps even thrive.

• Landforms change shape less frequently when there is a greater number of species using the land.

Multiple Choice

Which of the following contributes most to promoting sustainability in an ecosystem?

• Lack of decomposers.

• A balanced water table

• Variety of organisms.

• A narrow temperature range.

Multiple Choice

A fire partially destroys a temperate deciduous forest. In the following spring, small mosses and low growing plants are observed growing amongst the burned trees and former underbrush. This is an example of -

• secondary succession

• diversity

• primary succession

• climax community

Multiple Choice

How is an invasive species of plant harmful to an environment?

• it grows slowly

• it will not harm the environment

• it blocks sunlight and takes nutrients that native plants need

• it adapts and becomes one with the native plants

Multiple Choice

After this prairie was flooded, all the animals left and the grasses died. Which organism will most likely return first?

• jackrabbit

• hawk

• coyote

• grasses

Multiple Choice

What would happen to this food chain if there was no grass?

• The grasshoppers would eat the mice, and the snakes would move away.

• The mice would have more grasshoppers to eat.

• The snake population would increase.

• The grasshopper population would decrease.

Multiple Choice

What happened to the raccoon population after the changes to the wetland ecosystem?

• Stayed the same

• Increased

• Decreased

• Not enough information to tell

Multiple Choice

_______ is when contanimants are brought into an enviornment and causes a negative change. (fill in blank.)

• Recourse extraction

• Nonnative Species

• Pollution

Multiple Choice

A dam was built on the Colorado river and blocked the migration of fish. The fish population will likely...

• Stay the same

• Decrease

• Increase

• Increase then decrease

Multiple Choice

As you remove resources from an ecosystem, what happens to the population of an organism?

• It increases

• It stays the same

• It increases then decreases

• It decreases

Multiple Choice

If a disease strikes the snake population in the food chain shown, what will be the initial effect on the populations of hawks and rabbits?

• The populations of hawks and rabbits will decrease.

• The populations of hawks and rabbits will increase.

• The population of hawks will increase. The population of rabbits will decrease.

• The population of hawks will decrease. The population of rabbits will increase.

Multiple Choice

In the stable food chain shown here, what would you expect to happen initially if you were to suddenly double the population of rabbits?

• The populations of the other three species would also increase.

• The populations of the other three species would decrease.

• The grass population would decrease. The snake population and hawk population would increase.

• The grass population and hawk population would decrease. The snake population would increase.

Multiple Choice

What event within the food chain might lead to the graph shown below?

• A disease in the population of rabbits.

• A disease in the population of snakes.

• A disease in the population of hawks.

• It is impossible to tell which of the above occurred.

Multiple Choice

What happened to the tree population in this forest?

• The number of trees stayed the same for two years and then began to decrease.

• The number of trees stayed the same for two years and then began to increase.

• The number of trees decreased for two years and then stayed the same.

• The number of trees increased for two years and then stayed the same.

Multiple Choice

Field mice are the primary food source for horned owls in an area. Due to a drought, many field mice left the area. Which result would this drought most likely have on the horned owls?

• The horned owl population will consume more field mice.
• Horned owls will follow the field mice to a different area.
• The horned owl population will increase in the area.
• Horned owls will change to a plant-based diet.