Pollination and fertilization BIOLOGY - Pollination and fertilization

Mention characteristics of entomophilous and anemophilous flowers.

Describe the post-fertilisation changes taking place in an ovary.

Draw a labelled diagram of an ovule as seen in a longitudinal section.

Describe the events taking place between pollination and fertilisation.

What is the function of pollen tube? Trace its path from stigma to the female gamete by means of a diagram.

The flowers large, brightly coloured and attractive are generally

A hood covering the stigma acts as a barrier in

When the stamens mature earlier than the gynoecium of the same flower, it is called

When the anthers and the stigma of a bisexual flower mature at the same time, it is called

After fertilisation, the ............. becomes the fruit and the becomes the seed. (ovule/ ovary/integuments)

Salvia is a/ an ..............flower (entomophilous/ornithophiles/ hydrophilous)

Double fertilisation is common in ............. (gymnosperms/angiosperms)

Bougainvillea flowers are pollinated by .............. (wind/insects/water)

Cross pollination takes place in all ............. plants. (monoecious/dioecious)

State any three structural features found in flowers which favour cross pollination.

Rewrite the terms in correct order in a logical sequence beginning with the term that is underlined
Stigma, Pollen tube, Pollen grains, Female gamete, Male gamete

Rewrite the terms in correct order in a logical sequence beginning with the term that is underlined
Integuments, Funiculus, Egg. Nucellus, Embryo sac.

Rewrite the terms in correct order in a logical sequence beginning with the term that is underlined
Intine, Pollen tube, Exine, Tube nucleus, Male gametes.

Observe the figure given below and answer the questions that follow:

(i) Label parts 1-4 shown in the figure.
(ii) By what method do you think the flower is being pollinated.
(ii) Explain the mechanism of pollination shown above.

Observe the given figure and answer the following questions:

(i) What is shown in the given figure?
(ii) Label the parts 1 to 6.
(iii) What is the fate of given structure after fertilisation?

Observe the given figure and answer the following questions:

(i) What is shown in the figure?
(ii) Label the parts marked 1, 2 and 3.
(iii) Name a plant which shows this phenomenon.

Give two advantages and two disadvantages each of self and cross pollination.

Vallisneria flowers are pollinated by wind.

Anemophilous flowers are large and bright.

In maize the pollination is brought about by insects.

Cross pollination always occurs in unisexual flowers.

Fertilisation is fusion of anther and stigma.

Distinguish between the following:
(i) Protandry and Protogyny
(ii) Self pollination and Cross pollination
(iii) Fruit and Ovary
(iv) Ovule and Seed.

Explain the following terms:
(i) Anemophilous flower
(ii) Zygote
(iii) Double fertilisation
(iv) Gametes

State four differences between insect and wind pollinated flowers.