flowers and pollination

Question 1

what is the carpel and what does it include?

Answer 1

it is the female reproductive part of a flower. it includes the stigma, style, and ovary

Question 2

what is stamen and what does it include?

Answer 2

it is the male reproductive part of a flower and it includes: anther and filament.

Question 3

what is the function of the anther?

Answer 3

makes the pollen grains

Question 4

function of the stigma

Answer 4

sticky platform for pollen to attach

Question 5

function of filament

Answer 5

holds up the anther

Question 6

function of the style

Answer 6

holds stigma up, above the ovary

Question 7

what part contains the eggs/ovules? and is it in stamens or the carpel?

Answer 7

the ovary contains the eggs. it is in the carpel - the female part.

Question 8

function of sepal

Answer 8

protects flower bud

Question 9

function of petals

Answer 9

attracts insects

Question 10

define pollination

Answer 10

pollination is the transfer of the pollen from the anther(male gamete) to the stigma (female outer-most part)

Question 11

name all 10 parts of a flower

Answer 11

1. stigma
2. style
3. ovary
4. ovule
5. anther
6. filament
7. petal
8. sepal
9. peduncle
10. receptacle

Question 12

list the two ways pollination can occur

Answer 12

self-pollination

cross-pollination

Question 13

list 3 advantages and 3 disadvantages of self-pollination

Answer 13

advantages:

• maintains purity of race
• plant does not need to produce a large amount of pollen
• flowers don’t develop devices for attracting insects
  disadvantages:
• new characters are rarely introduces
• immunity to diseases decreases
• offsprings weaken
• adaptability to changed environments is reduced

Question 14

which is more favoured? cross-pollination or self-pollination? why?

Answer 14

cross-pollination is more favoured because offsprings are healthier and has more variety

Question 15

define self pollination

Answer 15

pollen grains falling on the stigma of the same or another flower but same plant

Question 16

define cross-pollination

Answer 16

pollen grains falling on the stigma of another flower of the same kind but different plant

Question 17

what is the story of pollination

Answer 17

1-Insects are attracted by the bright colours and
sweet scent of the flowers
2-Insects land on the flowers and pollen sticks to their body.
3-When the insects move about the plant or from plant to plant the pollen sticks to the stigma. This process is called Pollination.
4-The pollen moves down the style and into the
ovary.
5-The pollen joins with the eggs in the ovary to produce new seeds. This process is called Fertilisation.

Question 18

define insect pollinated plants

Answer 18

when insects visits the flower, pollen gets stuck to them. when they move to the flowers of another plant, the pollen from the first flower rubs off on to the stigma of the next flower.

Question 19

define wind-pollinated plants

Answer 19

the pollen from the flower of one plant is blown by the wind and might land on the stigma of another plant’s flower.