Biology - Nutrition in flowering plants

Question 0

Testing for starch

Answer 0

• Drip leaf in boiling water - to kill it
• Place leaf in boiling ethanol - to remove chlorophyll
• Wash with water - to soften it
• Cover in iodine solution

If starch is present - blue/black

Question 1

Photosynthesis equation

Answer 1

6CO2 + 6H2O —-> C6 H12 O6 + 6O2

Question 2

Safety cautions you should use when testing for starch

Answer 2

Wear goggles

Use water bath for ethanol as it is flammable

Question 3

Testing if chlorophyll is needed for photosynthesis

Answer 3

Use a variegated leaf

Test the green and white areas

Question 4

Testing if light is needed for photosynthesis

Answer 4

Put 1 leaf in light

Put the other in the dark

Question 5

Testing if carbon dioxide is needed for photosynthesis

Answer 5

Place 1 leaf in an atmosphere with CO2

Use NAOH to absorb the carbon dioxide