Match the items in Column I with those in Column II.
Column I Column II
(i) Feathery stigma
hanging out rafflesia
(ii) Different timings for maturation
of anthers and stigma Entomophilous
(iii)Pollination by elephant Wind pollination
(iv)Flowers produce nectar Dichogamy
Complete the following statements: (i) Pollination is the process of transfer of _____________ (ii) The two kinds of pollination are ________ and __________ (iii) For self-pollination the flowers need not be ___________ and showy. (iv) For self-pollination, _______ and ________ must mature at the same time. (v) Self-pollination does not yield _________ varieties. (vi) In __________ pollination there is much wastage of ____________.
Mention if the following statements are true
(i) Intine is the outer wall of pollen grain.
(ii) Pollen tube enters ovule through micropyle.
(iii) Zygote gives rise to embryo
(iv) Ovule becomes fruit.
(v) Dry sepals may persist in some fruits
Which one of the following is one of the characteristics of self-pollinated flowers? (a) Flowers are large and showy (b) Flowers remain closed and do not open (c) Stigma and anthers mature at the same time (d) Pollen is produced in very large quantities
State the name of the chief pollinating agent against the corresponding plant by choosing from those given in brackets.
(a) Dahlia _______ (Crow, butterflies, mosquito)
(b) Maize _______ (Bees, locusts, rain, wind).
(c) Vallisneria ______ (wind, water, ants, rabbits).
Match the items in column A with those in Column B.
Column A Column B (a) Generative nucleus (i) Pollen tube (b) Germ pore (ii) Endosperm nucleus (c) Exine (iii) Testa (d) Secondary nucleus (iv) Fertlization (e) Integument (v) Male nuclei (f) Egg nucleus (vi) Rough
Fill in the blanks with suitable words.
(a) Transfer of pollen grains from anthers to stigma of the same flower is called ________
(b) Different timings for maturation of gynoecium and androecium, is called __________
(c) ________ is a water-pollinated flower
Name the parts of the ovary which give rise to:
(a) Seed _______
(b) Fruit __________
(c) Fruit wall ___________
Give one word/term for the following:
(a) A flower containing both male and female parts
(b) Arrangement of flowers on a twig/stem
(c) When pollen grains of a flower reach the stigma of the same flower
(d) When maturation time of reproductive parts in a flower is different.
(e) When stigma and anthers do not grow up to same height, which favours only crosspollination?
(f) Pollination of flowers by insects
(g) Pollination of flowers by birds.
What are the advantages of the following in the flower to the plant concerned?
(a) Long and feathery stigma
(b) Brightly coloured petals
(c) Smooth and light pollen
(d) Protruding and easily movable anthers
(e) Fragrant nectar
Given alongside is a diagrammatic sketch of the sectional view of a germinating pollen grain. Study the same and then answer the questions that follow:
(a) Name the parts labeled 1,2,3,4, and 5
(b) Where does the germination of the pollen grain take place and how?
(c) What is the function of the part labeled ‘4’?
(d) What happens to the part labeled ‘5’ during the process?
Given below is a diagrammatic representation of the process of fertilization. Study the same and then answer the questions that follows:
(a) Name the parts labeled 1,2,3,4, 5 and 6.
(b) What happens to (i) Ovary (ii) Ovule after fertilization?
(c) What is the function of the synergids?
(d) What part does the stigma play in the process of fertilization?
Terms & Policies
Terms & Policies