Unit 3 Flashcards

(36 cards)

1
Q

Biodiversity

A

the variety of life in the world or a particular ecosystem

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2
Q

Species

A

organisms that can interbreed to produce fertile offspring

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3
Q

Population

A

the total number of one species or plant or animal in a habitat

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4
Q

site of photosynthesis

A

chloroplasts

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5
Q

Name of stage 2 of photosynthesis

A

Carbon fixation

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6
Q

Indicator species

A

A species that, when present, indicates the level of pollution in the area

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7
Q

By-product of photosynthesis

A

oxygen

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8
Q

Products of stage 1 of photosynthesis that move onto stage 2

A

Hydrogen and ATP

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9
Q

Examples of abiotic factors

A

temperature, pH and light intensity

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10
Q

examples of biotic factors

A

competition, predation and disease

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11
Q

Community

A

all of the organisms living in a habitat

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12
Q

A food chain

A

a series of organisms which depend on each other for food/energy represented by diagrams with arrows indicating the flow of energy

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13
Q

producer

A

plants that use the sun to make their own food

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14
Q

Consumer

A

any organism that doesn’t make it’s own food via photosynthesis

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15
Q

Herbivore

A

a consumer that only eats plant material

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16
Q

Omnivore

A

a consumer that eats both plant and animal material

17
Q

Carnivore

A

a consumer that eats only other animal material

18
Q

Niche

A

The role an organism play in its community

19
Q

Interspecfic competition

A

Competition between members of different species for a few of the same resources

20
Q

Intraspecific competition

A

competition between members of the same species for all of the same resources

21
Q

Biotic factors

A

factors that affect biodiversity that relate to living organisms

22
Q

Abiotic factors

A

factors that affect biodiversity that relate to non-living parts of the habitat

23
Q

Human Influences

A

things that humans do which affect the biodiversity of a particular habitat

24
Q

pH meter

A

a device with a probe that measure (soil) pH

25
Light meter
a device with a sensor that gives information about the light intensity
26
Quadrats
a square grid used to sample plants or very slow moving organisms
27
Pitfall traps
a plastic (save the turtles) container that is buried so that small invertebrates fall into it and can be counted
28
Photosynthesis
The process by which green plants produce their own food
29
Word equation for photosynthesis
carbon dioxide + water --> sugar + oxygen
30
Uses for energy
- an organism keeping itself warm - moving around - building tissue
31
How much energy is lost at each stage of the food chain?
90%
32
Advantage and Disadvantage of pyramid of numbers
Advantage - relatively simple to measure | Disadvantage - doesn't take in account the biomass of each species
33
Advantage and Disadvantage of pyramid of energy
Advantage - it is more accurate than any other pyramid | Disadvantage - it is very difficult to get a reliable measurement of the energy content of some organisms
34
Effect of use of nitrates
increase in crop yield
35
Disadvantages of using fertilisers
if it rains and they leech into rivers/lochs etc algal blooms can form which reduces the oxygen available to other species in the water
36
Disadvantage of pesticides
they can accumulate in the tissues of the organisms that consume plants that has been sprayed with pesticides