Populations and Biodiversity Unit Test

Question 1

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

Answer 1

dispersion

Question 2

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

Answer 2

commensalism

Question 3

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

Answer 3

indirect

Question 4

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

Answer 4

kill

Question 5

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

Answer 5

Reproductive potential

Question 6

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

Answer 6

reproductive potential

Question 7

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

Answer 7

size; density; dispersion

Question 8

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

Answer 8

carrying capacity

Question 9

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

Answer 9

limiting

Question 10

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

Answer 10

territory

Question 11

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

Answer 11

density

Question 12

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

Answer 12

density

Question 13

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

Answer 13

niche

Question 14

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

Answer 14

Competition

Question 15

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

Answer 15

restriction

Question 16

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 _________

Answer 16

mutualism

Question 17

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

Answer 17

birth

death

Question 18

the type of interaction between cats and mice is ________

Answer 18

predation

Question 19

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

Answer 19

parasite

Question 20

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

Answer 20

Parasite

predator

Question 21

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

Answer 21

symbiosis

Question 22

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

Answer 22

expotential

Question 23

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

Answer 23

coevolution

Question 24

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

Answer 24

negative

Question 25

the number and variety of species on Earth is called_________

Answer 25

biodiversity

Question 26

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

Answer 26

poaching

Question 27

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

Answer 27

keystone species

Question 28

a recreational experience among life forms and ecosystem is called ________

Answer 28

ecotourism

Question 29

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

Answer 29

threatened species

Question 30

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

Answer 30

habitat conservation

Question 31

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

Answer 31

gene

Question 32

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

Answer 32

endangered species

Question 33

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

Answer 33

Biodiversity Treaty

Question 34

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

Answer 34

germ plasm bank

Question 35

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

Answer 35

Mass extinction

Question 36

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

Answer 36

exotic species

Question 37

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

Answer 37

keystone species

Question 38

the content of plant seeds is also known as _______________

Answer 38

germ plasm

Question 39

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

Answer 39

genetic diversity

Question 40

the sources of many antibiotics are in chemicals produced by _________

Answer 40

fungi

Question 41

a crop produced by combining genetic materials is called ___________

Answer 41

hybrid variety

Question 42

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

Answer 42

inbreeding

Question 43

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

Answer 43

exotic species

Question 44

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

Answer 44

extinct

Question 45

the florida panther is an __________________as a result of habitat destruction

Answer 45

endangered species

Question 46

honeycreepers found in Hawaiian Islands are an example of an _________________

Answer 46

endemic species

Question 47

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

Answer 47

biodiversity hotspot

Question 48

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

Answer 48

biotechnology

Question 49

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

Answer 49

captive breeding

Question 50

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

Answer 50

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

Question 51

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

Answer 51

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

Question 52

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

Answer 52

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