Asexual And Sexual Reproduction In Plants

Question 1

Asexual reproduction

Answer 1

-includes one parent
-the offspring are genetically identical to each other and the parent
-cells are produced by mitosis
-may occur naturally by runners or tubules or bulbs
-can occur artificially by taking cuttings

Question 2

Sexual reproduction

Answer 2

-two parents are required
-two gametes fuse together to create a new cell
-offspring are genetically varied

Question 3

Pros of asexual reproduction

Answer 3

-faster don’t have to find a mate
-consistency in the plants produced

Question 4

Cons of asexual reproduction

Answer 4

-makes the species more susceptible to disease

Question 5

Pros of sexual reproduction

Answer 5

-offspring genetically varied
-species adapt to a changing environment

Question 6

Cons of sexual reproduction

Answer 6

-takes longer to find a mate

Question 7

Anther

Answer 7

-produces male gametes

Question 8

Filament

Answer 8

-allows positioning of anther so that pollen grains can be distributed

Question 9

Stigma

Answer 9

-where the pollen grains attach to, often sticky

Question 10

Style

Answer 10

-positions stigma to accept pollen grains. The pollen tube will grow through the style

Question 11

Ovary

Answer 11

-contains the ovule, and develops into the fruit after fertilisation

Question 12

Nectar

Answer 12

-sweet sugary substance that attracts insects, found in the nectary.

Question 13

Petal

Answer 13

-colourful, and sometimes with special markings, to attract insects for pollination

Question 14

Sepal

Answer 14

-green leaf like structures that protects the flower in the bud

Question 15

Ovule

Answer 15

-located inside the ovary, a structure that contains the immature egg cell

Question 16

How does fertilisation occur in plants

Answer 16

1. Pollen transferred from anther to stigma
2. The enzymes in the pollen digest the style to form a pollen tube
3. The pollen tube enters the ovary through the micropyle
4. The pollen nucleus travels down the pollen tube
5. Once it enters the ovary it fuses with the egg (fertilisation)

Question 17

Pollination

Answer 17

Is the transfer of pollen from the anther to the stigma of the plant

Question 18

Fertilisation

Answer 18

Is the fusion of male and female gametes (occurs after pollination)