B4 - IT'S A GREEN WORLD

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Distribution
Detail of where species are found over the total area where they occur. E.g woodlice may have a high distribution under a log
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Population
The number of organisms of a species in a given area
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Community
All the populations of organisms that live together and interact in the same area
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Relationship
Interaction between different species living together in the same area, such that one species affects another. E.g a predator-prey relationship.
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Sampling
Counting a small number of a large total population in order to study its distribution
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Habitat
Place where organisms live
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Key
Series of questions used to classify organisms
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Ecosystem
System including the organisms in an area and how they interact, along with non-living conditions such as rainfall, temperature, and the soil
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Biodiverstiy
Measure of how many different types of organism live in an area
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Zonation
A gradual change in the distribution of species across a habitat
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Chlorophyll
Green substance found in chloroplasts, where light energy is trapped for photosynthesis
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Photosynthesis
Process by which plants build carbohydrates from carbon dioxide and water, using sunlight energy
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Rate of Photosynthesis
How quickly a plant is photosynthesising, The rate is affected by factors including carbon dioxide levels, light, and temperature
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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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Leaf
Plant organ specialised for photosynthesis
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Stomata
Pores on the surface of a leaf that allow water, carbon dioxide, and oxygen to move in and out of the leaf
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Palisade Layer*
Tissue made up of tall columnar cells containing chloroplasts, where the majority of photosynthesis occurs in leaf.
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Diffusion
The spreading of 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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Concentration Gradient
Difference in concentration of a substance form one region to another,
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Osmosis
Movement of water across a partially permeable membrane from an area of high water concentration (a dilute solution) to an area of low water concentration (a concentrated solution)
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Pore
Small Opening. Pores on the surface of a leaf allow water and gases to move in and out of the leaf
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Partially Permeable Membrane
Membrane that has small pores through which small molecules such as water can pass, but not larger molecules such as proteins
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Tissue
Group of cells of similar structure and function working together, such as muscle tissue in an animal and xylem in a plant.
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Organ
Collection of different tissues working together to perform a function with an organism; examples include the stomach in an animal and the leaf in a plant
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Xylem
Plant tissue made up of dead cells that has the function of transporting water and dissolved substances through the plant
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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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Transpiration Stream
Continuous flow of water up through the xylem of a plant, from the roots up to the leaves where it evaporates
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Transpiration
Movement of water up through the xylem of a plant, from the roots up to the leaf
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Translocation
Transport of sugars made in photosynthesis in the leaf to areas of the plant that store them or use them
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Rate of Transpiration
How quickly a plant is losing water by transpiration (evaporation form its leaves). The rate is affected by factors including humidity, air movement, and temperature.
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Potometer
Apparatus used to measure the rate of transpiration by measuring the uptake of water by a plant.
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Minerals
Substances such as nitrates, phosphates, potassium, and magnesium compounds taken up by the plants from the soil, that are needed for growth.
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Deficiency Symptom
Unhealthy symptoms shown by plants that lack essential minerals, or by animals that lack essential minerals or vitamins in their diet.
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Active Transport
Process that can move substances across cell membranes from low concentrations to high concentrations (against a concentration gradient). Active transport uses energy and is carried out by carrier proteins in the cell membrane
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Other cards in this set

Card 2

Front

The number of organisms of a species in a given area

Back

Population

Card 3

Front

All the populations of organisms that live together and interact in the same area

Back

Preview of the back of card 3

Card 4

Front

Interaction between different species living together in the same area, such that one species affects another. E.g a predator-prey relationship.

Back

Preview of the back of card 4

Card 5

Front

Counting a small number of a large total population in order to study its distribution

Back

Preview of the back of card 5
View more cards

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