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Science > Populations and Biodiversity Unit Test > Flashcards

Populations and Biodiversity Unit Test Flashcards

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Biology 101 flashcards
1
Q

a populations ________ is usually described as even, clumped, or random.

A

dispersion

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2
Q

A robin that does not affect the tree in which it nests is an example of _______

A

commensalism

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3
Q

If two species use the same food source at different times, they are _______ competitors

A

indirect

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4
Q

unlike a predator in relation to its prey, a parasite does not usually _____ its host

A

kill

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5
Q

The average age at which members of a species reproduce is that species’ __________

A

Reproductive potential

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6
Q

the maximum number of offspring that each member of a population can produce is the population’s _________ __________

A

reproductive potential

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7
Q

the three main properties used to describe a population are _____, ______, and ________

A

size; density; dispersion

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8
Q

the _______ _______ of an ecosystem for a particular species is the maximum population that the ecosystem can support indefinitely

A

carrying capacity

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9
Q

the amount of food available for wolves in an area determines the ecosystem’s carrying capacity for wolves and is a _______ resource for wolves

A

limiting

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10
Q

Members of a species compete indirectly for resources by competing for a ________ and for social dominance

A

territory

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11
Q

a population’s ______ is the number of its members per unit area or per volume

A

density

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12
Q

deaths that are caused by a disease spreading through a population are ________ dependent

A

density

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13
Q

a species’ _____ includes that species’ physical home, the environmental factors necessary for that species’ survival, and all its interactions with other species

A

niche

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14
Q

a type of interaction between two species in which both species are harmed is _________

A

Competition

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15
Q

Niche _______is when each species use less of the niche than it is capable of using, in order to reduce competition for resources with other species

A

restriction

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16
Q

the organisms in a cow’s stomach have a constant source of food; the organisms help the cow break down and use the grass as it eats. This type of relationship is an example of _________

A

mutualism

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17
Q

a populations growth rate is its _____ rate minus its ______ rate

A

birth

death

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18
Q

the type of interaction between cats and mice is ________

A

predation

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19
Q

A liver fluke is a ______that harms its host as it obtains food

A

parasite

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20
Q

A ________ usually only weakens it host, while a ______usually kills its prey

A

Parasite

predator

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21
Q

a relationship in which two organisms live in close association, such as mutualism and commensalism, is called ________

A

symbiosis

22
Q

If a pair of mice finds a place to live with plenty of food and no predators, the population of mice will probably undergo_________growth

A

expotential

23
Q

Over a long period of time, two species can develop adaptations that increase the benefit of their relationship in the process of _________

A

coevolution

24
Q

a population has a _________growth rate when the death rate is higher that the birth rate

A

negative

25
Q

the number and variety of species on Earth is called_________

A

biodiversity

26
Q

the illegal hunting and slaughter of African elephants for their ivory tusks is also known as _______

A

poaching

27
Q

A __________is any that is essential to the health of an ecosystem

A

keystone species

28
Q

a recreational experience among life forms and ecosystem is called ________

A

ecotourism

29
Q

any species with a declining population that could become endangered is a _________________

A

threatened species

30
Q

a plan designed to protect one or more species in a large tract of land is known as a _____________________plan

A

habitat conservation

31
Q

a _____ is a segment of DNA that codes for a specific trait

A

gene

32
Q

an ____________________ is any species likely to become extinct if it is not protected

A

endangered species

33
Q

the ___________________is a treaty to preserve biodiversity that resulted from the Earth Summit in 1992

A

Biodiversity Treaty

34
Q

a ____________________provides storage for germ cells (such as seeds or DNA) of organisms that may become endangered

A

germ plasm bank

35
Q

the death of many species in a relatively short time is known as

A

Mass extinction

36
Q

an _____________is an organism that is not native to a particular region

A

exotic species

37
Q

a ____________is an organism that is critical to an ecosystem’s functioning

A

keystone species

38
Q

the content of plant seeds is also known as _______________

A

germ plasm

39
Q

the kind of diversity represented by all the different genes found in a population is called ____________________

A

genetic diversity

40
Q

the sources of many antibiotics are in chemicals produced by _________

A

fungi

41
Q

a crop produced by combining genetic materials is called ___________

A

hybrid variety

42
Q

a population in which _________takes place may be prone to inherited diseases

A

inbreeding

43
Q

fire ants in the southeastern U.S. are an example of an _________________

A

exotic species

44
Q

the passenger pigeon is an example of a bird that was once abundant in the U.S. but is now _________

A

extinct

45
Q

the florida panther is an __________________as a result of habitat destruction

A

endangered species

46
Q

honeycreepers found in Hawaiian Islands are an example of an _________________

A

endemic species

47
Q

the Amazon rainforest is an example of a habitat with a high species variability known as a ___________________

A

biodiversity hotspot

48
Q

the application of biological sciences to create products such as drugs from plants or other organisms is known as ________________

A

biotechnology

49
Q

a ______________________program is being used to help increase the population of California condors

A

captive breeding

50
Q

If a population of rabbits experiences expotential growth, what might happen to the population of coyote in the area. Explain

A

coyotes might experience expotential growth more will be able to survive and reproduce because coyotes eat rabbits

51
Q

predict what might happen to the population of rabbits and coyotes if the rabbits exceed the carrying capacity of the environment. Explain

A

starvation and diseases might occur, because more animals use more resources so rabbits will start to die off and so will coyotes because rabbits are what they eat

52
Q

What are two main benefits of protecting entire ecosystems rather than individual species of plants or animals?

A

species in that ecosystem might not have been discovered and might protect save more than one species by protecting an entire ecosystem

Science (14 decks)

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