Hydrophytes And Xerophytes

Question 1

What are hydrophytes

Answer 1

Plants that live in, or on the edges of, bodies of water

Question 2

List all adaptations to do with the leaves of hydrophytes

Answer 2

Very thin , no waxy cuticle
Many always open stomata on the top of the leaf
Wide flat leaves
Air sacs

Question 3

List all other adaptations of hydrophytes ( not to do with the leaves)

Answer 3

Reduced structure to the plant
Small roots
Large SA of stems and roots under water
Aerenchyma, packing tissue forms in the leaves, stems and roots

Question 4

What is aerenchyma and its functions

Answer 4

Specialised parenchyma ( packing tissue) forms in the leaves stems and roots of hydrophytes 
Has many large air spaces formed by apoptosis, programmed cell death

Question 5

What are xerophytes

Answer 5

Plants that are adapted to living in dry conditions, conserve water

Question 6

Adaptations of xerophytes, to do with leaves

Answer 6

Thick waxy cuticle
Reduced number of leaves
Hairy leaves
Curled leaves leaf loss

Question 7

Adaptations of xerophytes, not to do with leaves

Answer 7

Sunken stomata 
Reduced number of stomata 
Succulents 
Root adaptations 
Avoiding problems

Question 8

Explain which/ how adaptions of xerophytes create micro climates of humid air

Answer 8

Sunken stomata located in the pits, reduces air movement
Hairy leaves, traps air
Curled leaves, confines all stomata into the same area decreasing water vapour gradient

Question 9

How do xerophytes avoid problems

Answer 9

Lose leaves completely, become dormant , die completely leaving seeds behind to germinate + grow rapidly when rain falls