Daily Practice Problems Sexual Reproduction in Flowering Plants

Question 1:

Which among the following terms best describe a typical angiosperm anther? [Level: Moderate]

(a) Monothecous, bilobed, monosporangiate

(b) Dithecous, bilobed, bisporangiate

(d) Dithecous, bilobed, tetrasporangiate

Question 2:

Identify the incorrect statement regarding the pollen grain. [Level: Moderate]

(a) Intine layer of pollen grain is thin, continuous and made up of cellulose and pectin.

(b) In majority of angiosperms, pollen grains are shed in three-celled stage.

(d) Sporopollenin is responsible for the ability of pollen grains to be preserved as fossils.

Question 3:

The pollen viability of which among the members of following families does not last for months? [Level: Moderate]

(a) Solanaceae

(b) Leguminosae

(d) Rosaceae

Question 4:

The innermost layer of the anther wall that provides nourishment to the developing pollen grains is called: [Level: Easy]

(a) endothecium

(b) mesothelium

(d) endothelium

Question 5:

The region of attachment of the ovule body with the funicle is referred to as: [Level: Easy]

(a) hilum

(b) micropyle

(d) nucellus

Question 6:

The number and the nature of divisions undergone by the megaspore to form the female gametophyte in a typical angiosperm is: [Level: Difficult]

(a) one meiotic and two mitotic divisions

(b) two meiotic and one mitotic division

(d) three mitotic divisions

Question 7:

Choose the incorrect statement regarding the pollination. [Level: Moderate]

(a) In anemophilous flowers, pollen grains are produced in enormous amount.

(b) Hydrophily is limited to only 30 genera in angiosperms, most of which are monocotyledons.

(d) Pollen robbers are insects that consume pollen grains without bringing about pollination.

Question 8:

Which of the following represents the correct sequence of the artificial hybridisation technique? [Level: Moderate]

(a) Bagging – Emasculation – Debagging – Pollen dusting - Rebagging

(b) Emasculation – Bagging – Rebagging – Pollen dusting – Debagging

(d) Emasculation – Rebagging – Debagging – Pollen dusting – Bagging

Question 9:

The white kernel surrounding the coconut water represents: [Level: Easy]

(a) female gametophyte

(b) cellular endosperm

(d) megasporangium

Question 10:

Identify the correct statement. [Level: Difficult]

(a) Embryo development precedes endosperm development.

(b) The primary endosperm cell divides repeatedly to form a diploid endosperm tissue.

(c) The cells of endosperm tissue are filled with reserve food materials like starch, oil and proteins for the development of the growing embryo.

(d) In most of the angiosperm endosperm development, the PEN undergoes successive nuclear divisions each accompanied by wall formation.

Question 11:

Which among the following indicate the set of structures which are diploid, haploid and triploid respectively? [Level: Moderate]

(a) Embryo sac, egg cell and the primary endosperm cell

(b) Zygote, antipodal cell and the primary endosperm cell

(d) Secondary nucleus, zygote and the primary endosperm cell

Question 12:

The portion of the embryonal axis above the level of cotyledons ends into the: [Level: Moderate]

(a) radicle

(b) coleoptile

(d) coleorhiza

Question 13:

The number of chromosomes in the endosperm of plant whose root tip cells have 42 chromosomes is: [Level: Difficult]

(a) 21

(b) 42

(d) 84

Question 14:

Choose the correct set of plants in which the endosperm is completely consumed by the developing embryo before their seeds mature. [Level: Moderate]

(a) Groundnut, beans and castor

(b) Pea, groundnut and beans

(d) Castor, coconut and wheat

Question 15:

The base of the nucellus from where the integuments arise is called: [Level: Moderate]
(a) chalaza

(b) micropyle

(d) hilum

Question 16:

Statement I: [Level: Difficult]
Although geitonogamy is functionally autogamy but genetically it is cross pollination.

Statement II:

Cleistogamous flowers are invariably autogamous as they do not open at all.

With respect to the statements given above, choose the correct answer from the options given below:

(a) Statement I is correct but Statement II is incorrect.

(b) Statement I is incorrect but Statement II is correct.

(d) Both Statement I and Statement II are correct.

Question 17:

Match the items given in Column I to Column II and find the correct answer from the options given below: [Level: Difficult]

Column I	Column II
1. Epicotyl	(i) Hollow foliar structure enclosing the shoot apex and leaf primordia.
2. Hypocotyl	(ii) Region below the level of cotyledons.
3. Coleoptile	(iii) Region above the level of cotyledons.
4. Coleorhiza	(iv) Undifferentiated sheath covering the radicle and the root cap.

	1.	2.	3.	4.
(a)	(iii)	(ii)	(iv)	(i)
(b)	(ii)	(iii)	(iv)	(i)
(c)	(iii)	(ii)	(i)	(iv)
(d)	(ii)	(iii)	(iv)	(i)

Question 18:

Which among the following is not a contrivance to prevent self-pollination? [Level: Moderate]

(a) Heterostyly

(b) Chasmogamy

(d) Cleistogamy

Question 19:

The term given to the residual persistent nucellus present in mature seeds of beet and black pepper is: [Level: Easy]

(a) pericarp

(b) scutellum

(d) mesocarp

Question 20:

The process of formation of fruits without fertilization is called: [Level: Easy]

(a) parthenocarpy

(b) parthenogenesis

(d) agamospermy

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