Angiospermae - assignment 5

Question 1

differences between gymnospermae and angiospermae

Answer 1

gymnospermae:

• have cones
• seeds are carried naked

angiospermae:

• have flowers
• seeds are carried in flowers

Question 2

(look at sketch) what are floral leaves 1 and 2 and what are their functions?

Answer 2

1- petals: colored for pollination

2- sepels: protection

Question 3

( look atsketch) why are 3 and 4 regarded as micro sporophyte

Answer 3

microsporophyte - diploid male structure

Question 4

(sketch) general name for 3 and 4

Answer 4

stamen

Question 5

(sketch) labels for 3 and 4

Answer 5

3- anther

4- filment

Question 6

(sketch) why are 5,6,7 regarded as macro sporophyte

Answer 6

macro sporophte- diploid female structure

Question 7

(sketch) general name for 5,6,7

Answer 7

pistil

Question 8

(sketch) labels for 5,6,7

Answer 8

5- stigma
6- style
7- ovary

Question 9

(sketch- sexual reproduction of flower) what are theprocesses that occur at a and b

Answer 9

A- pollination: transfer of pollen from stamen to stigma of the same species flower
B- fertilization: fusing of a sperm cell and egg cell to form a zygote

Question 10

(look at sketch- flowering plant) labels for 1-7

Answer 10

1- germinating pollen grain (n)
2- anther (2n)
3- pollen tube ( n)
4- ovary (2n)
5- ovule (2n)
6-egg cell (n)
7- sperm cell (n)

Question 11

(look at sketch- flowering plant) what happens after thE completion of process B

Answer 11

• Zygote undergoes mitosi an the process anddevlops into embryo within the seed
• ovule develops into a seed
• ovary develops into a fruit
• seed germinates and forms the new flowering plant (sporophyte)

Question 12

what is the biological importance of flowering plants for humans

Answer 12

• food
• tea, coffee, cocoa
• number of products
• aesthetic value
• medicine