IB Biology - Ecology

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20 Terms

1

Ecology

The study of interactions between living organisms and their environment.

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2

Ecosystem

A biological community of interacting organisms and their physical environment.

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3

Habitat

The natural home or environment where an organism lives.

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4

Autotroph

An organism that produces its own food through photosynthesis or chemosynthesis.

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5

Heterotroph

An organism that obtains energy by consuming other organisms.

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6

Trophic Level

The position an organism occupies in a food chain.

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7

Producer

An organism that can make its own food, usually through photosynthesis (e.g., plants).

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8

Herbivore

A consumer that eats plants for energy.

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9

Carnivore

A consumer that eats other animals for energy.

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10

Omnivore

A consumer that eats both plants and animals.

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11

Consumer

An organism that feeds on other organisms for energy (e.g., animals).

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12

Decomposer

An organism that breaks down dead organic matter into simpler compounds (e.g., fungi, bacteria).

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13

Food Chain

A linear sequence of organisms through which nutrients and energy pass as one organism eats another.

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14

Food Web

A complex network of interconnected food chains within an ecosystem.

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15

Biomass

The total mass of organisms in a given area or volume.

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16

Biodiversity

The variety of different species within an ecosystem or habitat.

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17

Niche

The role or function of an organism in its ecosystem, including its habitat and interactions with other species.

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18

Symbiosis

A close and often long-term interaction between two different biological species.

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19

Mutualism

A type of symbiotic relationship where both organisms benefit.

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20

Parasitism

A type of symbiotic relationship where one organism benefits at the expense of the other.

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