Key Words Unit 4 Biology
4.0 / 5 based on 2 ratings
- Created by: Edward
- Created on: 16-03-13 18:44
Distribution
Detail of where species are found over the total area where they occur. For example woodlice may have a high distribution under a log.
1 of 35
Population
The number of organisms in a given area.
2 of 35
Community
All the populations of organisms that live together and interact in the same area.
3 of 35
Sampling
Counting a small number of a large population in order to study it's population.
4 of 35
Habitat
Place where an organism lives.
5 of 35
Ecosystem
System including the organisms in an area and how they interact, along with non-living conditions such as rainfall, temperature, and the soil.
6 of 35
Biodiversity
Measure of how many different types of organisms live in an area.
7 of 35
Zonation
A gradual change in the distribution of species across a habitat.
8 of 35
Chlorophyll
Green substance found in chloroplasts, where light energy is trapped for photosynthesis.
9 of 35
Photosynthesis
Process by which plants build carbohydrates from carbon dioxide and water, using sunlight energy.
10 of 35
Rate Of Photosynthesis
A measure of how quickly a plant is photosynthesising. The rate is affected by factors including carbon dioxide levels, light and temperature.
11 of 35
Limiting Factor
Factor such as carbon dioxide level, light or the temperature, that will affect the rate of photosynthesis if it is in short supply. increasing the limiting factor will increase the rate of photosynthesis.
12 of 35
Diffusion
The spreading of particles of a substance or a gas in solution, resulting in net movement from a region of a high concentration to a region of lower concentration. the bigger the difference in concentration, the faster diffusion happens.
13 of 35
Concentration Gradient
Difference in concentration of a substance from one region to another.
14 of 35
Osmosis
Movement of water acoss a partially permeable membrane from an area of high water concentration ( a dilute solution) to an area of low water concentration (a concentrated solution)
15 of 35
Pore
Small opening. Pores on the surface of a leaf allow water and gases to move in and out of the leaf.
16 of 35
Partially Permeable Membrane
Membrane that has small pores through which small molecules such as water can pass, but not larger molecules such as proteins.
17 of 35
Tissue
Group of cells of similar structure and function working together, such as muscle tissue in an animal and xylem in a plant.
18 of 35
Organ
Collection of different tissues working together to perform a function within an organism: examples include the stomach in an animal and the leaf in the plant.
19 of 35
Xylem
Plant tissue made up of dead cells that has the function of transporting water and dissolved substances through the plant.
20 of 35
Phloem
Plant tissue made up of living cells that has function of transporting food substances through the plant.
21 of 35
Transpiration Steam
Continuous flow of water up through xylem of a plant, from the roots up to the leaves where it evaporates.
22 of 35
Translocation
Transport of sugars made in photosynthesis in the leaf to areas of the plant that store then or use them
23 of 35
Transpiration
Movement of water up through xylem of a plant, from the roots up to the leaves.
24 of 35
Minerals
Substances such as nitrates, phosphates, potassium and magnesium compunds taken up by plants from the soil, that are needed for plant growth.
25 of 35
Deficiency Symptom
Unhealthy symptoms shown by plants that lack essential minerals, or by animals that lack essential minerals or vitamins in their diet.
26 of 35
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.
27 of 35
Decay
Breakdown of organic matter such as dead organisms or food, by microbes.
28 of 35
Recycling
Movement of elements from one place to another being used in different ways time after time, such as carbon passing between living and non living components and being reused.
29 of 35
Microbes
Micro-organisms such as bacteria and yeast.
30 of 35
Preservation
Process that prevent food or other organic material from decaying, such as canning, freezing, drying or salting.
31 of 35
Battery Farming
Farming technique in which large numbers of animals are reared indoors,
32 of 35
Hydrophonics
Growing plants in greenhouses without soil. their roots are sprayed with a solution that contains all the minerals they need.
33 of 35
Organic Farming
Farming method that does not use intensive techniques and minimises the use of artificial chemicals.
34 of 35
Biological Control
Using a natural predator to control a pest, instead of using pesticides.
35 of 35
Other cards in this set
Card 2
Front
The number of organisms in a given area.
Back
Population
Card 3
Front
All the populations of organisms that live together and interact in the same area.
Back
Card 4
Front
Counting a small number of a large population in order to study it's population.
Back
Card 5
Front
Place where an organism lives.
Back
Related discussions on The Student Room
Similar Biology resources:
5.0 / 5 based on 2 ratings
1.0 / 5 based on 1 rating
0.0 / 5
3.0 / 5 based on 1 rating
0.0 / 5
0.0 / 5
2.5 / 5 based on 3 ratings
3.0 / 5 based on 1 rating
4.0 / 5 based on 2 ratings
0.0 / 5
Comments
No comments have yet been made