Unit 1.2 Learning Activities

Question 1

Do ferns belong to pteridophytes or bryophytes?

Answer 1

Pteridophyta

Question 2

Why do the leaves of ferns not lose water as easily as those of moss?

Answer 2

Ferns have waterproof cuticle; moss does not

Question 3

To reproduce sexually why must moss plants live in moist conditions?

Answer 3

The sperm (motile male gamete) need a film of water in which to swim and reach the egg for fertilisation to take place.

Question 4

why are the leaves of ferns called sporophylls?

Answer 4

Spore - bearing leaves

Question 5

By looking at the fronds of ferns mention two features that will determine the plant is a fern?

Answer 5

Coiled up new leaf
Sori on leaves

Question 6

Absence of vascular tissue?

Answer 6

Bryophyta

Question 7

presence of vascular tissue?

Answer 7

Pteridophyta
Gymnospermae
Angiospermae

Question 8

True leaves and roots?

Answer 8

Pteridophyta
Gymnospermae
Angiospermae

Question 9

cuticle?

Answer 9

Pteridophyta
Gymnospermae
Angiospermae

Question 10

new leaves coiled?

Answer 10

Pteridophytes

Question 11

homosporous?

Answer 11

Bryophyta
Pteridophyta

Question 12

heterosporous?

Answer 12

Gymnospermae
Angiospermae

Question 13

fertilisation need water?

Answer 13

Bryophyta
Pteridophyta

Question 14

motile sperms?

Answer 14

Bryophyta
Pteridophyta

Question 15

Fertilisation independent of water?

Answer 15

Gymnospermae
Angiospermae

Question 16

pollen tubes / non motile sperm

Answer 16

Gymnospermae
Angiospermae

Question 17

Reproductive cones?

Answer 17

gymnospermae

Question 18

Flower?

Answer 18

Angiospermae

Question 19

seeds?

Answer 19

Gymnospermae
Angiospermae

Question 20

Fruit?

Answer 20

Angiospermae

Question 21

Which division of plants does moss belong to?

Answer 21

Bryophyta

Question 22

Why can moss not grow any taller?

Answer 22

The moss cannot grow taller , as it does not have any strengthening tissue (xylem)

Question 23

What reproductive cells will the hair-like structures form?

Answer 23

spores
(in sporangia)

Question 24

Through what part of the plant body is water absorbed?

Answer 24

The plant absorbs water through its whole body as it. has no waterproof cuticle

Question 25

Visible attributes of Gymnosperms

Answer 25

Plants occur in cones Leaves are needle- shaped

Question 26

sporophyte produces:

Answer 26

spores

Question 27

gametophyte produces:

Answer 27

gametes

Question 28

plant cells through mitosis produce:

Answer 28

spores

Question 29

fertilisation produces:

Answer 29

zygote

Question 30

Which process increases chromosome number?

Answer 30

fertilisation

Question 31

which process decreases chromosome number?

Answer 31

meiosis

Question 32

The distinction between ferns and seed-bearing plants is similar to difference between amphibians and reptiles:

Answer 32

Both ferns and amphibians need external water in which the male gametes swim to the female gamete (depend on water for fertilisation)

Question 33

In the pollen grain, what is the sperm being protected against?

Answer 33

Protected against drying out

Question 34

A seed allows the development of an embryo to be delayed. Why is this advantageous?

Answer 34

Seed will germinate when conditions are suitable, warmth & moisture available

Question 35

Asexual reproduction = vegetative propagation?

Answer 35

Vegetative parts of plant such as stem, roots and leaves form new parts by mitosis.

Question 36

If mitosis was the only kind of reproduction - how would the world be different?

Answer 36

Less variety among organisms Some species extinct less opportunity to adjust to enviro changes