Botany XII+ - Sexual Reproduction in Flowering Plants 12

Question : 1

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Read the following four statements:
(a) In most plants, by the time of the fruit develops from the ovary, other floral parts degenerate
(b) Embryos of monocotyledons have a single cotyledon that is situated towards posterior side
(c) After fertilisation, ovary develops into fruit and ovules develop into seeds
(d) In orchids, each fruit contains thousands of tiny seeds
How many of the above statement(s) is/are wrong?
 

Options:

	3
	4
	1
	2

Solution :

(C)

Scutellum→ Lateral side

You scored 0 of 1

Question : 2

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Residual, persistent, nucellus is found in the seeds of
 

Options:

	Beet and coconut
	Castor and barley
	Sunflower and black pepper
	Black pepper and beet

Solution :

(D)

Perispermic seeds

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Question : 3

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Mark the incorrect match.
 

Options:

	True fruit – Mango
	Parthenocarpic fruit – Banana
	False fruit – Orange
	Eucarpic fruit – Groundnut

Solution :

(C)

Orange → True fruit

You scored 0 of 1

Question : 4

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Which of the following statement for monocot embryogeny is correct?
 

Options:

	Holoblastic and endoscopic
	Zygote divides vertically producing suspensor cell and embryonal cell
	Exoscopic and meroblastic
	Development of single celled suspensor

Solution :

(D)

Meroblastic, endoscopic

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Question : 5

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Which of the following features of mature seeds are crucial for storage of seeds which can be used as food throughout the year and also to raise crop in the next season?
 

Options:

	Dormancy and high water content
	Dehydration and dormancy
	High metabolic activity and hydration
	Hydration and low metabolic activity

Solution :

(B)

As the seed matures its water content is
reduced and seeds become relatively
dry.

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Question : 6

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Given below is the diagram of an embryo of grass. In which of the following all the three parts labelled as A, B and C are correctly identified?

                                  

Options:

	(A) Scutellum, (B) Radicle, (C) Shoot apex
	(A) Epiblast, (B) Coleorhiza, (C) Scutellum
	(A) Epiblast, (B) Coleoptile, (C) Scutellum
	(A) Scutellum, (B) Coleorhiza, (C) Epiblast

Solution :

(B)

Coleoptile is protective covering of
plumule and coleorhiza is protective
covering of radicle

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Question : 7

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In apple, cashew and strawberry plants
 

Options:

	Sepals and ovary both contribute to fruit formation
	Only thalamus contributes to fruit development
	Ovary and thalamus both contribute to fruit development
	Only ovary contributes to fruit formation

Solution :

(C)

False fruits (Pseudocarps)

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Question : 8

(skipped)

Read the following statements carefully:
(a) Seeds have better adaptive strategies for dispersal to new habitats
(b) Parthenocarpy can be induced through the application of growth hormones
(c) Mustard and guava plants produce dry fruits
(d) Seed viability in Lupinus arcticus is 2000 years
Which two of the above statements are correct?
 

Options:

	c & d
	a & c
	b & c
	a & b

Solution :

(D)

Guava– Fleshy fruit
Mustard- Dry fruit

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Question : 9

(skipped)

In sunflower, maize and coconut plants
 

Options:

	Triple fusion is absent
	Endosperm persists in the mature seeds
	Endosperm is not formed in life cycle
	Embryo development precedes endosperm development

Solution :

(B)

Albuminous seeds

You scored 0 of 1

Question : 10

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Which of the following pairs is wrongly matched while the remaining three are correct?
 

Options:

	Orobanche, Ficus     –   Parasitic species with tiny s eeds
	Coleorhiza               –   Undifferentiated sheath
	0.1% TTC                –   Testing of seed viability
	Gram                     –    Exalbuminous seed

Solution :

(A)

Ficus is not a parasitic plant.