Structure and gas exchange in a leaf:

Question 1

What do gaurd cells do?

Answer 1

= creates the spore, stomata where gas exchange happens

Question 2

What are the spongy mesophyl?

Answer 2

= air spaces
= allowing gases to pass through/diffuse
= maintain a concentration gradient
=

Question 3

What does paliside mesiphul do?

Answer 3

= where photosynthesis occurs
= closer to the top and requires direct sunlight
= has chlorophyll, chloroplast, maximises light absorbption for phosoythesis

Question 4

What is gas exchange at the stomata?

Answer 4

= oxuge diffuses out
= co2 diffuses in
= to reduce water loss by evporation stomata close at night where phosoytnesis does not occu

Question 5

How are plants adapyted tp reduce water loss?

Answer 5

= xerophytic plants
= structural features to enable efficient gas exxchabge to occur to limit water loss
= curled leaves- trap moisture to increase humudity
= hairs to trap moisture
= sunken stomata to trap mpisture
= thicker cuticle to reduce aevpoation
= longer root network to reach more water

Question 6

How is water loss reduced?

Answer 6

= stomata closes at night
= when photosynthesis isnt occuring
=