Plant Reproduction

Question 1

What is the carpel?

Answer 1

the female reproducing organs

Question 2

what is the stamen?

Answer 2

the male reproducing organs

Question 3

parts of the stamen

Answer 3

anther, filament

Question 4

parts of the carpel

Answer 4

ovary, ovule, stigma, style, pollen tube

Question 5

parts of the flower not a part of the carpet or the stamen

Answer 5

sepal, receptacle, stem, petal

Question 6

pollination?

Answer 6

transfer of pollen grain from the anther to the stigma

Question 7

self pollination?

Answer 7

Self-pollination occurs
when pollen grains fall
directly from anther into
the stigma of the same
flower, or different
flower the same plant

Question 8

advantages of self pollination

Answer 8

-ensures that recessive characters are eliminated.
-wastage of the pollen grain is very less compared to cross-pollination
-the purity of the race is maintained, as
there is no diversity in the genes
-ensures that even a smaller quantity of produced pollen
grains from plants have a good success rate in pollination.

Question 9

advantages pf self pollination

Answer 9

Self- pollination ensures that recessive characters are eliminated.
The wastage of the pollen grain is very less compared to cross-pollination
In the process of self- pollination, the purity of the race is maintained, as
there is no diversity in the genes
Self-pollination ensures that even a smaller quantity of produced pollen
grains from plants have a good success rate in pollination.

Question 10

disadvantages of self pollination

Answer 10

The vigour and vitality of the race are reduced

The immunity to diseases is reduced in the resultant offsprings.

Question 11

what is cross pollination?

Answer 11

type of
pollination that allows
the transfer of pollen
grains from the anther
of the flower into the
stigma of another
flower of the same
species

Question 12

cross-pollination requires the help of….

Answer 12

pollinators: wind, animals: birds, insects and ,water

Question 13

advantages of cross pollination

Answer 13

-The produced seeds are good in vigour and vitality.
-The recessive characters in the lineage are eliminated as a result of genetic
recombination.
-This process improves the immunity of the offsprings towards the diseases and other
environmental factors.
-Cross-pollination introduces new genes into a sequence of species and this is mainly
due to the fertilization between genetically different gametes.

Question 14

disadvantages of cross pollination

Answer 14

-In this process, there is a great wastage of pollen grains.
-Due to genetic recombination during meiosis, there are chances of eliminations of good
qualities and additions of unwanted characteristics in offspring.