What is a seed plant?

Question 1

challenge cuticle cope with?

Answer 1

1. DESSICATION= cope by having waxy impermeable layer= prevent h2o loss

Question 2

What are the 5 key features shared by all seed plants? (5)

Answer 2

1. All have SEEDS: for nourishing EMBRYO

2 Alteration of Generations: Reduction of GAMETOPHYTE Increase of SPOROPHYTE

3. HETEROSPOREY - production of 2 different types of spores

4. They have oVULES

5. They have POLLEN

Question 3

Seeds:

a) Label all different parts of a seed. State their functions. (3+3

Answer 3

PARTS OF SEED:

1. embryo
2. cotyledon
3. seed coat

Question 4

There are two types of spores formed in sporophyte of seed plants.
(a) What are these two spores? (2)

Answer 4

1. mega and micro spore

Question 5

How do pollens remove the dependence on water when transporting male gametes? (1)

Answer 5

sporopollenin ( to transfer gamete)

Question 6

How do pollens remove the dependence on flagellated sperms when carrying the male gametes to meet female gametes?

Answer 6

pollen tube carries gamete

Question 7

State two structures of a seed that ermits seed dormancy.

Answer 7

SEED COAT & COTYLEDON (food storage)

Question 8

Give two advantages of seed dormancy.

Answer 8

1. enables seeds to travel vast distances without desiccation
2. seeds can sustain germination until right time

Question 9

What do these two spores develop into, respectively?

Answer 9

mega= femal gametophyte with egg
micro= male gametophyte (pollen) with sperm

Question 10

(c) Which one is protected by ovule? (1)

d) Which one is protected by pollen? (1) ( mega/microspore

Answer 10

ovule protects egg

pollen protects sperm