B4

HideShow resource information
  • Created by: apple87
  • Created on: 11-03-14 18:20
What is population?
All of the organisms of one species in a habitat
1 of 22
What is a community?
Population of different species in a habitat.
2 of 22
What formula do you use to estimate population size using the capture and recapture method?
(Number in first sample x number in second sample) / number in second sample previously marked
3 of 22
What is zonation?
The gradual change in te distribution of species across a habitat.
4 of 22
What is biodiversity?
A measure of the variety of life in a area.
5 of 22
What is glucose converted into in plants?
For respiration, Cells walls, Stored in seeds, starch, proteins
6 of 22
What is diffusion?
The net movment of particles fram and area of higher concentration to an area of lower concentration.
7 of 22
What is osmosis?
The net movement of water molecules across a partially permeable membrane from a region of higher concentration to a region of lower concentration
8 of 22
What does the phloem tube do?
Transports food up and down called translocation
9 of 22
What does the xylem vessel do?
Transports water up. MAde of dead cells.
10 of 22
What is transpirstion increased by?
Light intensity, air pressure, air movement, air humidity gets yellow older leaves
11 of 22
What three main minerals do plants need?
Nitrates- amino acids, proteins Phosphates- respiration and growth has poor root growth and discoloured older leaves Potassium- helps the enzymes needed for photosynthesis and respiration. Poor flowe and fruit growth, discoloured leaves.
12 of 22
What factors affect decay?
Temperature, amount of water amount of air, oxygen
13 of 22
What are the problems of intensive farming?
Destroys natural habitats, eutrophication, distrubs food chains, battery hens- ethical issues.
14 of 22
What is hydrophonics?
Plants are grownin nutrient soloutions instead of in soil. Often used for greehouse tomatoes on a commercial scale.
15 of 22
What are the problems of biological control?
Predator could eat usful species, not each the anials you want it to, get out of control, might not stay in the area
16 of 22
What are the alternatives to intensive farming?
Organic fertilisers, crop rotation, weeding, varying seed planting times, biological control.
17 of 22
What are the problems with organic farming?
Takes up more space, more labour intensive, can't grow as much.
18 of 22
What do plants need magnesium for and what happens if they don't get enough?
Chlorophyll which is needed for photosynthesis. Plants without enough magnesium have yellow leaves
19 of 22
What does the stomata do?
Automatically closes when water from the roots starts to dry up.
20 of 22
How does the stomata work?
The cells go eithe turgid to open of flaccid to close
21 of 22
What four factors increase transpiration rate?
Increase in light intensity. Increase in air movement. Increase in tmeperature. Decrease in air humidity
22 of 22

Other cards in this set

Card 2

Front

What is a community?

Back

Population of different species in a habitat.

Card 3

Front

What formula do you use to estimate population size using the capture and recapture method?

Back

Preview of the front of card 3

Card 4

Front

What is zonation?

Back

Preview of the front of card 4

Card 5

Front

What is biodiversity?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all B4 resources »