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22 Cards in this Set

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Nitrates

Make amino acids, which are needed in making proteins

Magnesium

Makes chlorophyll

Phosphate

Essential for DNA and membrane

Potassium

Essential for plant membrane

Biological control

Introducing biological organisms which will eat pests but not crop (birds eat caterpillars)

Pesticide

Chemical that kill pests

Pallisade Mesophyll

Tall cells closely packed to absorb light and light. Contain chloroplasts. Photosynthesis takes place.

Spongy Mesophyll

Capture light and make food. Air spaces between for easier gas exchange.

Epidermis

Protects leaf, transparent to let light through

Plant Veins

Xylem on top phloem on bottom

Xylem


Water is absorbed from the soil through root hair cells


Transported through the xylem vessels up the stem to the leaves


Evaporates from the leaves (transpiration)

Phloem

Transports sucrose and amino acids up and down the stem

Stomata

Allow gas exchange, water Vapour lost through it. Only open in photosynthesis in daylight, close at night to reduce loss of water.

Photosynthesis chemical equation

6CO2 + 6H2O > 6O2 + C6H12O6

Photosynthesis word equation

Carbon dioxide + water > oxygen + glucose

How plants use glucose

•respire


•store as starch


•turned into cellulose


•used to make fats and oils

What xylem consists of

Dead cells, thigh and strengthened cellulose cell wall with hollow lumen.

What xylem consists of

Dead cells, thick and strengthened cellulose cell wall with hollow lumen.

What phloem consists of

Columns of living cells

Plants store carbohydrates

Starch or glucose

Plants store carbohydrates

Starch or glucose

Animals store carbohydrates

Glycogen