Photosynthesis

Question 1

What does the structure of the chloroplast contain, with functions? (6)

Answer 1

1 Stroma- contains enzymes for dark phase.
2 Lamella (Thylakoid)- contains chlorophyll
3 Starch grain- stores form of glucose
4 Double membrane- allows entry of water and CO2
5 Ribosome- forms enzymes for photosynthesis
6 Granum- consists of groups of lamella

Question 2

what are the 8 adaptations of leaves for photosynthesis?

Answer 2

1 Epidermis- transparent to allow light through
2 Cuticle- waxy to reduce water loss
3 Spongy mesophyll- Thin walls for entry of CO2 and water
4 Xylem- Continuous tubes for transport of water and minerals
5 phloem- Transports the products to other parts of plant
6 Guard cell- Chloroplasts present to trap light and thick and thin walls to control opening and closing of stomata
7 Stoma - Abundant on central surface for exchange of gases
8 Palisade Mesophyll- Elongate cells allow deep penetration of light

Question 3

what is the greenhouse effect?

Answer 3

The process that occurs when the sun’s rays go through the Earths atmosphere and is then trapped by greenhouse gases instead of retiring back to space, as a result, the planet heats up

Question 4

what is a greenhouse?

Answer 4

a greenhouse is a special building that is used to grow plants in an area where they wouldn’t normally grow that well

Question 5

define photosynthesis

Answer 5

the process where green plants manufacture their own food- glucose- from CO2 and H20 using radiant energy from the sun trapped by chlorophyll in chloroplast and oxygen is a by-product