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Biology > S2 Biology Test Phtotsnthesis > Flashcards

S2 Biology Test Phtotsnthesis Flashcards

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1
Q

Name 3 reasons why plants are so important?

A

Plants provide oxygen
Plants provide a high energy food source
Plants provide medicine
Plants provide shelter

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2
Q

Why are leaves wide?

A

A large surface area helps to absorb more light energy

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3
Q

Why are leaves thin

A

It helps get carbon dioxide from the bottom to the top of the leaf.

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4
Q

What is the formula for photosynthesis?

A

Carbon dioxide +water = chlorophyll = glucose+oxygen
Raw material. Light energy. Products

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5
Q

What does the upper emidermis do?

A

Protects inner layers
Transparent to let light through

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6
Q

What does the lower epidermis do?

A

Protects inner layers
Contains stoma to allow gas exchange

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7
Q

What do palisade mesophyll cells do?

A

Main site of photosynthesis
Full of chloroplasts

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8
Q

What do spongy mesophyll cells do?

A

Loosely arranged with air spaces to let co2 and o2 move into and out of cells

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9
Q

What does the stomata do?

A

Pores which allows gas exchange

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10
Q

What do guard cells do?

A

Change their shape to control gas exchange on the stoma

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11
Q

What does the basic part of a leaf section consist of?

A

Upper epidermis
Lower epidermis
Palisade mesophyll layer
Spongy mesophyll layer
Air spaces
Guard cells surrounding stoma pores on the lower surface

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12
Q

What must there be on the epidermis?

A

A waxy waterproof covering (cuticle)

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13
Q

What process is photosynthesis?

A

The process in which green plants make their own food

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14
Q

What do green plants convert light energy into?

A

Chemical energy

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15
Q

What do plants require to make photosynthesis?

A

Water and carbon dioxide

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16
Q

How is water taken into the plants

A

Through the roots

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17
Q

How does the water get from the roots to the leaves?

A

By travelling up the roots into the stems and then to the leaves

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18
Q

What do plants produce as a by product if photosynthesis?

A

Oxygen

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19
Q

What happens to the oxygen after photosynthesis

A

It is released into the atmosphere

20
Q

What is needed to trap light energy for photosynthesis

A

Chlorophyll

21
Q

Where is chlorophyll found in green plants?

A

In chloroplast in green plant cells

22
Q

What do plants make in the process of photosynthesis?

A

Glucose (sugar) oxygen

23
Q

What do plants store glucose as?

A

Starch

24
Q

What do plants also use glucose to make?

A

To make cellulose for plant cell walls

25
Q

What do herbivores eat?

A

Only plants

26
Q

What do carnivores eat?

A

Only other animals

27
Q

What do omnivores eat

A

Both plants and animals

28
Q

An example of a herbivore?

A

Cows
sheeps
Rabbits

29
Q

Examples of omnivores

A

Bears
Dogs
Ducks

30
Q

Examples of carnivores

A

Lions
Wolf
Sharks

31
Q

What is a food chain

A

A food chain represents the transfer of energy from one organism to another.

32
Q

What do the arrows in a food chain represent?

A

Te direction of energy flow

33
Q

What are green plants known as in food chains

A

Producers as they make their own food

34
Q

What do consumers do?

A

They eat plants and other animals

35
Q

What is a food web

A

It’s an interconnected series of food chains

36
Q

Example of a food chain?
Mammal and a water one

A

Oak tree —>wood mouse—>weasel—>owl
[producer]. [Primary] [Secondary]. [Tertiary]

37
Q

What do predators eat?

A

Prey

38
Q

What do food chains/webs begin with

A

Producers

39
Q

What is the source if energy for producers

A

The sun

40
Q

What are producers ate by?

A

Primary consumers [herbivores ]

41
Q

What are the primary consumers eaten by

A

Secondary consumers

42
Q

What are secondary consumers eaten by

A

Tertiary consumers

43
Q

What is a pyramid number

A

Is a diagram showing the number of organisms at each stage of the food chain

44
Q

What does a pyramid of energy show?

A

It shows the energy content of all the organisms at each stage of the food chain

45
Q

What do u test a leaf for?

A

Starch

Biology (8 decks)

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