IGCSE Biology Key Words Flashcards

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1
Q

Nutrition (What nutrition do plants and animals need?)

A

The taking in of materials for energy, growth and development. Plants require light, carbon dioxide, water and ions. Animals need organic compounds and ions and usually need water

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2
Q

Excretion

A

The removal from organisms of waste products of metabolism (chemical reactions in cells including respiration), toxic materials and substances that are in excess of requirements

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3
Q

Respiration

A

The chemical reactions in cells that break down nutrient molecules and release energy for metabolism

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4
Q

Sensitivity

A

The ability to detect or sense stimuli in the internal or external environment and to respond appropriately

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5
Q

Reproduction

A

The processes that make more of the same kind of organism

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6
Q

Growth

A

A permanent increase in size and dry mass by an increase in cell number or cell size, or both

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7
Q

Movement

A

An action by an organism or part of an organism causing a change of position or place

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8
Q

Species

A

A group of organisms that can reproduce to produce fertile offspring

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9
Q

Binomial system

A

An internationally agreed system in which the scientific name of an organism is made up of two parts: the genus and the species

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10
Q

Tissue

A

A group of cells with similar structure working together to perform a shared function (job)

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11
Q

Organ

A

A structure made up of a group of tissues working together to perform specific functions

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12
Q

Organ system

A

A group of organs with related functions working together to perform body functions

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