BIOLOGY

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Describe the effect of an increase in water temperature.
An increase in water temperature can melt ice caps which will decrease the biodiversity as it is destroying organisms habitats.
1 of 20
Describe the effect of grazing on plant biodiversity.
If NO GRAZING takes place the dominant species takes over making biodiversity fall. If HEAVY GRAZING takes place all species are eating so biodiversity falls. If MODERATE GRAZING takes place the dominant species is held back so other species can grow
2 of 20
How does acid rain form?
Acid rain is formed by sulphur carbon and nitrogen in the air.
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How do humans impact the environment?
Air Pollution: Caused by the burning of fossil fuels and can cause acid rain. Deforestation: The cutting down of trees destroying habitats and harming the soil. Desertification: When the ground is no longer fertile and desert like with little plants.
4 of 20
What is the equation of an ecosystem?
Habitat + Community = Ecosystem
5 of 20
What is an advantage and disadvantage of monoculture?
Advantage=Cultivation is simpler and more efficient. Disadvantage=Disease and pests can spread easily.
6 of 20
What are the problems with leaching?
The top layer of soil absorbs water, when it leaks down it takes soluble chemicals with it. Once the chemicals sink they leave a hard crust making it hard to absorb more water.
7 of 20
3 essential plant nutrients, the role and deficiency symptoms of each.
Nitrogen: Necessary for formation of amino acids, without; poor plant growth. Phosphorus: Promotes early root formation and growth, without; abnormal discolouration. Potassium=Increases water-use efficiency, without; Curling and yellowing of leaves.
8 of 20
1 essential plant nutrient, the role and deficiency of it
Calcium=Involved in nitrogen metabolism, without; Stunned plant growth.
9 of 20
What is the difference between intra- and inter- specific competition.
Intraspecific= Competition for the same resources within the SAME species. Interspecific= Competition for the same resources within DIFFERENT species.
10 of 20
Name three ways energy is lost in a food chain.
HEAT, MOVEMENT, GROWTH
11 of 20
Why are most food chains 4 or less organisms in length?
As so much energy is lost at each stage.
12 of 20
Photosynthesis equation
CO2 + H2O ---->(light) O2 + Glucose
13 of 20
Respiration eqution
O2 + Glucose ---->(chlorophyll) CO2 + H2O
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Explain the "adaptive significance" of woodlice moving to dark/damp areas of a choice chamber.
This shows the woodlice need/prefer the dark and damp areas as they have adapted to living in those conditions.
15 of 20
Give one way errors may be minimised when using: Pitfall traps, Quadrats, pH meter, Light meter.
Check regularly so predatory animals don't eat others. Repeat process multiple times. Keep the probe at the same depth each time. Hold the meter at 90 degree angle to your body to avoid shading.
16 of 20
Give 2 types of isolation barriers and 2 examples of each.
Geographical: Rivers, Mountains. Ecological: Different habitats, pH.
17 of 20
Give examples of three mutagenic agents.
UV Light, Agent Orange and Mustard Gas
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Give examples of 2 structural adaptation of polar bears and cacti.
Polar Bear; small ears to reduce heat loss, thick layer of blubber for insulation and store of energy. Cacti; Splines instead of leaves to reduce water loss, stems that store water.
19 of 20
Give an example of a physiological adaptation of a desert rat.
It doesn't sweat to maintain water balance.
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Other cards in this set

Card 2

Front

Describe the effect of grazing on plant biodiversity.

Back

If NO GRAZING takes place the dominant species takes over making biodiversity fall. If HEAVY GRAZING takes place all species are eating so biodiversity falls. If MODERATE GRAZING takes place the dominant species is held back so other species can grow

Card 3

Front

How does acid rain form?

Back

Preview of the front of card 3

Card 4

Front

How do humans impact the environment?

Back

Preview of the front of card 4

Card 5

Front

What is the equation of an ecosystem?

Back

Preview of the front of card 5
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