Topic 4.1: Species, Communities, and Ecosystems Flashcards Preview

HL Biology > Topic 4.1: Species, Communities, and Ecosystems > Flashcards

Flashcards in Topic 4.1: Species, Communities, and Ecosystems Deck (15):
1

Define species

A species is a group of organisms that can potentially interbreed to produce fertile, viable offspring

2

Define population

A population is a group of organisms of the same species that are living in the same area at the same time

3

Define community

A group of populations living together and interacting with each other within a given area

4

Define habitat

The environment in which a species normally lives, or the location of a living organism

5

Define ecosystem

A community and its abiotic environment (i.e. habitat)

6

Define ecology

The study of the relationship between living organisms, or between living organisms and their environment

7

Define autotrophs

Autotrophs produce their own organic molecules using either light energy or energy derived from the oxidation of chemicals

8

Define heterotrophs

Heterotrophs obtain organic molecules from other organisms

9

Define consumers

Consumers ingest organic molecules from living or recently killed organisms

10

Define detritivores

Detritivores ingest organic molecules found in the non-living remnants of organisms (e.g. detritus, humus)

11

Define saprotrophs

Saprotrophs release digestive enzymes and then absorb the external products of digestion (decomposers)

12

Define herbivores

Herbivores are consumers that feed principally on plant matter (e.g. cows, sheep, rabbits)

13

Define carnivores

Carnivores are consumers that feed principally on animal matter (e.g. crocodiles, wolves, tigers)

14

Define omnivores

Omnivores are consumers that have a principle diet composed of both plant and animal matter (e.g. pandas, humans)

15

Define scavengers

Scavengers are a type of consumer that principally feed on dead and decaying carcasses rather than hunting live prey

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