Biology GCSE module 2 help(AQA)?

Question

need to know the answers to these q's as i got my gcse on wednesday.

How does CO2 and H2O enter a plant?(NOT WHERE)

How energy is provided for photosynthesis?

How O2 escapes from a leaf?

The 4 main uses of glucose?

What factors can affect photosynthesis?

What is a limiting factor?

Answer 1

I have too. So I will try and help...

CO2 enters by diffusion

H20 enter by osmosis

O2 escapes by diffusion

Main use is to provide energy. The energy is used to enable muscles to contract, build larger molecules using smaller molecules, to maintain a constant temperature, to make proteins and for respiration.

Carbon dioxide, light intensity and temperature.

A limiting factor means what stops photosynthesis. Which is temperature.

Answer 2

co2 by diffusion, h2o by evapotranspiration

by cellular respiration

by diffusion

cellular respiration,

light, co2, mineral ions, chlorophyll,02,glucose/starch, temp,

if not got enough it limits the reaction

Answer 3

have a look on GCE bitesize :) Helped me with my GCSE biology

Good luck :) (it's easier than you'd think)