C4 - Flashcards in GCSE Biology

Created by: Ellie Thompson
Created on: 04-06-13 16:38

Active transport

Process that can move substances across cell membranes from low concentrations to high concentrations (against the concentration gradient). Active transport uses energy and is carried out by carrier proteins in the cell membrane

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Battery farming

Farming technique in which large numbers of animals are reared indoors

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Biodiversity

Measure of how many different types of organisms live in an area

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Biological control

Using a natural predator to control a past, instead of chemical pesticides

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Xylem

Plant tissue made up of dead cells that has the function of transporting water and dissolved water through the plant

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Decay

Breakdown of organic matter, such as dead organisms or food, by microbes

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Diffusion

The spreading of the particles of a gas or a substance in solution, resulting in a net movement from a region of high concentration to a region of lower concentration. The bigger the difference in concentration, the faster the diffusion happens.

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Limiting factor

Factor such as carbon dioxide level, light or temperature that will affect the rate of photosynthesis if it is in short supply. Increasing the limiting factor will increase the rate of photosynthesis

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Transpiration

Movement of water up through the xylem of a plant, from the roots up to the leaves where it evaporates

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Phloem

Plant tissue made up of living cells that has the function of transporting food substances through the plant

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Other cards in this set

Card 2

Front

Farming technique in which large numbers of animals are reared indoors

Back

Battery farming

Card 3

Front

Measure of how many different types of organisms live in an area

Back

Card 4

Front

Using a natural predator to control a past, instead of chemical pesticides

Back

Card 5

Front

Plant tissue made up of dead cells that has the function of transporting water and dissolved water through the plant

Back

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C4