Life Science Ch. 21

Earth's surrounding atmosphere is part of its __________.

• biosphere

• food chains

• niche

• population

Tags

NGSS.MS-ESS2-6

In a particular area, a species is considered endangered if there are less than 800 individuals left. Based on the chart, which species would be considered endangered?

• eagles, darter fish, and tree toads

• eagles and may flies

• tree frogs and loose strife

• loose strife and may flies

Tags

NGSS.MS-LS2-4

Why is it impossible for any species to reach their biotic potential?

• Reaching biotic potential would require the extinction of all other species.

• Humans will reach their full biotic potential once the global population numbers 15 billion people.

• As long as there are too many producers the biotic potential cannot be reached.

• No ecosystem possesses unlimited resources and no limiting factors, which would be required for a species to reach the biotic potential.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

What is most likely to happen to an overpopulated species?

• The population will start to grow exponentially.

• Competition among members of the species will increase.

• Birth rates will further increase, the death rates will decrease.

• They will become extinct.

What happens to a population as it reaches the carrying capacity of an ecosystem?

• Population continues to increase.

• Population will decrease.

• Population will rise slowly then increase in the rate of increase.

• Population increases then remains constant.

Tags

NGSS.MS-LS2-4

Which fact is correct about most food chains?

• Consumers will always depend on producers for food.

• Consumer and producers belong to completely unrelated food chains.

• Producers always depend on consumers for food.

• Ecological problems are reduced by establishing a clear food chain order.

Tags

NGSS.MS-LS2-3

What is required for a species to experience exponential growth?

• hostile conditions, unlimited resources

• limited resources, ideal conditions

• bacteria

• ideal conditions, unlimited resources

Which of the following items have helped increase the carrying capacity of the environment for human populations?

• medical care and vast oceans

• food, medical care, and sanitation

• large deserts and clearing rainforests

• food, sanitation, and increased carbon dioxide in the atmosphere

Tags

NGSS.MS-ESS3-4

Which of Earth's oceans are included in the biosphere?

• all oceans

• Atlantic and Pacific

• Pacific and Indian

• Arctic only

A student drew lines on this figure indicating interactions among organisms. What does this altered figure represent?

• food chain

• commensalism

• food web

• habitat

Tags

NGSS.MS-LS2-2