Unit 4 Definitions Flashcards

(22 cards)

1
Q

What is a population

A

All of the organisms of one species in a habitat

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2
Q

What is a community

A

All if the different populations of species in a habitat

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3
Q

What is habitat

A

A place where an organism lives

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4
Q

What is an ecosystem

A

A mix of different communities and habitats and how they interact based on biotic and abiotic factors

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5
Q

What is an ecological niche

A

The organisms role within an ecosystem and its interaction with abiotic and biotic factors

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6
Q

What does a survival curve show

A

The percentage of the population still alive at each age

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7
Q

How do you calculate the life expectancy from a survival curve

A

Measure the age at which fifty percentage of the individuals are alive

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8
Q

What is a demographic transition model

A

Graph to represent how countries change with development

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9
Q

What does a population pyramid with a wide base and a narrow top show

A

A developing country
High birth rate
Increasing population
Young population

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10
Q

What does a population pyramid with a narrow base and a wide middle show

A

Developed country
Low birth rate
Decreasing population
Old population

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11
Q

What’s the structure of ATP

A

1 adenosine
3 phosphate
Ribose sugar

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12
Q

Where does ATP carry energy

A

In its bonds

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13
Q

What 3 ways can ATP be formed

A

Photo Phosphorylation, light dependent stage of photosynthesis
Substrate level phosphorylation, kerbs cycle and glycolysis
Oxidative Photophosphorylation, electron transport chain

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14
Q

What makes ATP from a good source of energy

A

Immediate, only need to break one weak bond

Manageable, releases small amount of energy so none is wasted

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15
Q

Give 4 uses of ATP from respiration in organisms

A

Active transport
Protein synthesis
Maintenance of body temperature
DNA replication

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16
Q

What is photosynthesis

A

Using light energy to make glucose

Occurs in plants to use the glucose in respiration

17
Q

Give 3 adaptations of plants for photosynthesis

A

Leaf near top of plant, closer to light
Leaf is thin and wide, large sa and short dp
Palisade cell has many chloroplasts, the site of photosynthesis

18
Q

How to measure the rate of photosynthesis in two ways

A

Measure amount of co2 used

Or measure amount of O2 produced using photosynthometer

19
Q

How does a photosynthometer work and calculate the rate of photosynthesis

A

Surround plant in sodium hydrocarbon ate solution
Collect O2 in capillary tube
Convert amount collected into volume using pie r squared
Volume divided by time to calculate the rate

20
Q

How does limiting light on the Calvin cycle effect ribulose biphosphate

A

Rbp decreases as being converted into GP but no reformation by triode phosphate as there’s no ATP

21
Q

How does limiting light on the Calvin cycle effect glycerate phosphate

A

GP increases as not converted into triose phosphate as there’s no ATP but is for me by rbp

22
Q

What is a species

A

A group of organisms with similar characteristics that can interbreed to produce fertile offspring