Chapter 18 Vocab

Question 0

Biotic

Answer 0

Living factors in environment.

Question 1

Ecology

Answer 1

The study of interactions of organisms with one another and their environment.

Question 2

Abiotic

Answer 2

Nonliving things in the environment.

Question 3

Population

Answer 3

A group of organisms of the same species that live in a specific geographical area.

Question 4

Community

Answer 4

All the populations of species that live in the same habitat and interact with each other.

Question 5

Ecosystem

Answer 5

A community of organisms and their abiotic environment.

Question 6

Biosphere

Answer 6

The part of Earth where life exists.

Question 7

Herbivore

Answer 7

An organism that eats only plants.

Question 8

Carnivore

Answer 8

An organism that eats only animals.

Question 9

Omnivore

Answer 9

An organism that eats both plants and animals.

Question 10

Food chain

Answer 10

The pathway of energy transfer through various stages as a result of the feeding patterns of a series of organisms.

Question 11

Food web

Answer 11

A diagram that shows the feeding relationship between organisms in an ecosystem.

Question 12

Energy pyramid

Answer 12

A triangular diagram that shows an ecosystem’s loss of energy, which results as energy passes through the ecosystem’s food chain.

Question 13

Carrying capacity

Answer 13

The largest population that an environment can support at any given time.

Question 14

Prey

Answer 14

An organism that is killed and eaten by another organism.

Question 15

Predator

Answer 15

An organism that eats all or part of another organism.

Question 16

Symbiosis

Answer 16

A relationship in which two different organisms live in close association with each other.

Question 17

Mutualism

Answer 17

A relationship between two species in which both species benefit.

Question 18

Commensalism

Answer 18

A relationship between two organisms in which one organism benefits and the other is unaffected.

Question 19

Parasitism

Answer 19

A relationship between two species in which one species, the parasite, benefits from the other species, the host, which is harmed.

Question 20

Coevolution

Answer 20

The evolution of two species that is due to mutual influence, often in a way that makes the relationship more beneficial to both species.