Plant Biodiversity- Aziem Mowzer

Question 1

What are the 4 plant divisions?

Answer 1

Bryophtes
Pteridophytes
Gymnosperms
Angiosperms

Question 2

The 3 main examples of bryophytes

Answer 2

Moss
Hornwort
Liverwort

Question 3

The main example of pteridophyte

Answer 3

Ferns

Question 4

The 4 main examples of gymnosperms

Answer 4

Conifers
Cycads
Gnetales
Ginkgo

Question 5

The 2 divisions of Angiosperms and what is the difference between the 2?

Answer 5

Monocotyledonous (monocots)
Dicotyledonous (dicots)
Monocotyledons have 1 cotyledon whereas Dicotyledons have 2 cotyledons.
MOnocotyledons have parallel veins on their leaves whereas dicotyledons have net veins on their leaves.
Monocots have an adventitious root system whereas dicots have a taproot system.
Monocots flower petals occur as multiples of 3 whereas dicots flower petals occur as either 4 or 5 petals.

Question 6

the 2 definitive plant generations

Answer 6

Sporophyte

Gametophyte

Question 7

Plants are divided according to presence or absence of:

Answer 7

Vascular tissue
True leaves, stem and roots
spores or seeds
fruits

Question 8

Number of chromosomes in humans

Answer 8

46

Question 9

Difference between normal cells and gametes (sperm and eggs)

Answer 9

Normal cells are diploids(2n)

Gametes are haploids(n)

Question 10

Difference between the sporophyte and gametophyte generation

Answer 10

Sporophyte generation is asexual and produces spores

Gametophyte generation is sexual and produce gametes

Question 11

Adaptations for a successfully life on land for plants

Answer 11

A cuticle 
stomata
plant body differentiated into true roots, stems and leaves.
vascular tissue
Strengthening tissue
Formation of seeds

Question 12

Two Types of reproduction

Answer 12

Asexual reproduction

Sexual reproduction

Question 13

Advantages of asexual reproduction

Answer 13

Advantages:
Large number of offspring are produced rapidly and simply
Energy expenditure is low
Offspring are identical to parents so they will be equally well suited to habitat

Question 14

Advantages sexual reproduction

Answer 14

Advantages:\
Forms basis of evolution
Genetic material of parents is reshuffled
Greater genetic variation

Question 15

disadvantages of asexual reproduction

Answer 15

Disadvantages:
No genetic variation
Less able to survive changes in environment
Can lead to overpopulation of clones

Question 16

disadvantages of sexual reproduction

Answer 16

Disadvantages:
Plants need agents
Process takes longer
Fewer offspring are produced
High energy costs