Chapter 10: Biodiversity Study Questions

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Define Biodiversity

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34 Terms

1

Define Biodiversity

Sure for biological diversity, is the variety of organisms in a given area, the genetic variation within a population, the variety of species in a community, or the variety of communities in an ecosystem.

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2

What does the study of biodiversity starts with?

The unfinished task of cataloging all the species that exist on earth

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3

What is the known number of species known to science?

1.9 million.

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4

When are new species considered known?

Collected and described scientifically

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5

Where do unknown species exist?

Remote wilderness, deep ocean, and even in cities

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6

Define species diversity

Refers to all the differences between populations of species, as well as between different species

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7

Define ecosystem diversity

Refers to the variety of habitats, communities, and ecological processes within and between ecosystems

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8

Define genetic diversity

Refers to all the different genes contained within all members of a population

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9

Define gene

Hey, segment of DNA that is located in a chromosome and that codes for a specific hereditary trait

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10

What does biodiversity affect the stability of?

Ecosystems and sustainability of populations

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11

Define Keystone species

A species that is critical to the functioning of the ecosystem in which it lives because it affects the survival and abundance of many other species in its community.

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12

What happens when genetic variation increases?

The chances that some members of the population may survive environmental pressures or changes.

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13

What happens when genetic variation decreases?

Population shrinks

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14

What are prescribed drugs in the U.S. deprived from?

Plants as well as chemicals found in fungi

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15

Define Hybrids

Crops developed by combining genetic material from other populations

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16

Define Ecotourism

A form of tourism that supports the conservation and sustainable development of ecologically unique areas

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17

Define Mass extinction

The extinction of many species in a relatively short period of time.

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18

What is the cause of the current mass extinction?

Global Change in climate

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19

What species are at risk of extinction?

Those that migrate

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20

Define endangered species

A species that has been identified to be in danger of extinction throughout all or a significant part of its range and that is thus under protection by regulations or conservation measures.

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21

Define Threatened Species

A species that has been identified to be likely to become endangered in the foreseeable future.

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22

What are the major causes of extinction today?

Destruction of habitats, the introduction of nonnative species, pollution , and overharvesting of species

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23

Define exotic species

A species that is not native to a particular region

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24

What are other causes of extinctions?

Excessive Hunting

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25

What are rare species harvested and sold for?

Pets, Houseplants, wood, food, or herbal medicine

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26

Define Poaching

The illegal harvesting of fish, game, or other species.

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27

What are some pollutants used by humans making their way into food webs around the globe?

Pesticides, cleaning agents, drugs, and other chemicals

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28

Define endemic species

A species that is native to a particular place and that is found only there

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29

What are tropical rainforest cleared for?

Farming and Cattle Grazing

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30

What are coral reefs threatened by?

Human Activities such as, pollution, development along waterways, and overfishing

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31

Define biodiversity hotspots

The most threatened areas of high species diversity on earth.

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32

What are examples of a biodiversity hotspot?

Tropical Rainforest, Coastal Areas, and islands

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33

What are some unique ecosystems in the U.S. ?

Florida Everglades, The California Coastal Region, Hawaii, the midwestern prairies, and the forest of the Pacific Northwest

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34

What land plants are high in diversity?

Pine Trees and Sunflowers

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