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Biology Y9 > Plants > Flashcards

Plants Flashcards

1
Q

Germination

A

Seed growing in the right conditions

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2
Q

Plants need

A

Vitamins + minerals to grow strong + healthy

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3
Q

Calcium

A

Needed to build cell walls

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4
Q

Magnesium

A

Chlorophyll formation

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5
Q

Nitrogen

A

Amino acids + protein formation

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6
Q

No nitrogen

A

Yellow/green leaves + weak stem

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7
Q

No potassium

A

Poor flower + fruit growth

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8
Q

No magnesium

A

Leaves turn yellow from bottom upwards

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9
Q

No phosphorus

A

Poor root growth

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10
Q

Chlorophyll

A

What makes leaves green and needed to absorb light for photosynthesis

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11
Q

Root hair cells

A

Have long thin hair coming from them giving them large surface area for absorbing water + nutrients from soil

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12
Q

Photosynthesis

A

How plants make own food. Light energy absorbed by chlorophyll converts carbon dioxide + water into glucose + oxygen.

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13
Q

Photosynthesis equation

A

Carbon dioxide + water —-> glucose + oxygen

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14
Q

Epidermis

A

Protects leaf. Stops bacteria + viruses entering the leaf

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15
Q

Palisade

A

Most photosynthesis occurs here. Cells packed with chloroplasts

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16
Q

Spongy mesophyll

A

Some photosynthesis occurs here. Less chloroplasts. Allows easy movement of gases

17
Q

Vein

A

Carries water in the xylem + food in the phloem

18
Q

Guard cells

A

Increase + decrease in size to control size of stomata

19
Q

Stomata

A

Small pores that allow gases in + out + how water is lost. More stomata on the lower surface

20
Q

Respiration equation

A

Glucose + oxygen —> carbon dioxide + energy + water

21
Q

Night time

A

No light for photosynthesis only respiration

22
Q

Midday

A

Hi sunlight intensity so high photosynthesis rate. Respiration constant all day and night

23
Q

Dawn/Dusk

A

Low sunlight intensity so low photosynthesis rate. Respiration is the same

24
Q

Hydrogen carbonate indicator

A

Normally red. Turns yellow in presence of high carbon dioxide + purple when the carbon dioxide levels are low.

25
Q

Water

A

Plant needs water to hold it up form of support

26
Q

Transpiration

A

When water evaporated for leaves of plants + more water is then drawn up the stem to replace it

27
Q

Guard cells

A

Special cells one either side of the stomata can change shape opening/closing over the stomata

Biology Y9 (6 decks)

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