Environmental 03/09/2023

What is a keystone species?

• A species on which other species in an ecosystem depend on

• A species that, if removed, would not impact the ecosystem

• A species that resembles a key

• A species that unlocks the potential of a biome

What are the three levels of Biodiversity?

• Genetic, Species and Ecosystem

• Systems, Security, Type

• Federal, State and Local

• Recycle, Plant trees and Picking up rubbish

Threats to biodiversity are...

• rain, arctic freezing, habitat loss

• climate change, arctic freezing, human population growth

• habitat loss, climate change, human population growth

• rain, human population growth, habitat loss

Why is genetic variation so important?

• for a population be able to adapt to a changing environment

• populations adapt better with the same genetic make-up

• it's not important

What is a Threatened Species?

• A species that is close to being extinct.

• A species that is already extinct.

• A nonnative species that is introduced into a area of land.

• A species which is close to being endangered.

Almost all of the antibiotics are derived from chemicals found in?

• flowers

• fungi

• fruits

• shrubs

It is estimated that habitat loss causes 75% of the extinctions that are now occurring.

• True

• False

Why is DDT banned?

• DDT was used to control insects

• rome

• It killed birds

• sparta's kill

US biodiversity hotspot

• Florida Everglades

• California Coast

• Pacific Northwest

• All of the above

What percent of the world's coral reefs are threatened by human activity?

• 60%

• 10%

• 40%

• 80%