Botany XII+ - Sexual Reproduction in Flowering Plants 13

Question : 1

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In adventive embryony, embryo arises directly from the cells of
 

Options:

	Embryo sac or nucellus
	Nucellus or integuments
	Funicle or egg apparatus
	Megasporangium or seed coat

Solution :

(B)

Adventive embryony or sporophytic
budding

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Question : 2

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Which of the following statement is wrong?

Options:

	Apomixis is found in most of the angiosperms, particularly in grasses
	Hybrid varieties of several food and vegetable crops provide higher and better yield
	Apogamy is formation of sporophyte directly from cells of gametophyte
	Vegetative propagation and agamospermy both are included in apomixis

Solution :

(A)

Some angiosperms

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Question : 3

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Phenomenon of having more than one embryo in ovule due to fertilization of more than one egg is called
 

Options:

	Mixed polyembryony
	Adventive polyembryony
	Simple polyembryony
	Cleavage polyembryony

Solution :

(C)

Mixed polyembryony is due to
fertilization of other cells like synergids,
antipodals

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Question : 4

(skipped)

In diplospory, embryo sac develops directly from
 

Options:

	Nucellar cell
	Egg cell
	Megaspore mother cell
	Antipodal cell

Solution :

(C)

In Apospory, from nucellar cell

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Question : 5

(skipped)

Who discovered polyembryony?
 

Options:

	Hartmann in mango
	Leeuwenhock in Allium
	Maheshwari in pear
	Leeuwenhock in Citrus

Solution :

(D)

Hartmann discovered soil layering

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Question : 6

(skipped)

Mark the incorrect match.
 

Options:

	Polyembryony – Onion, groundnut
	Non-recurrent agamospermy – Mango
	Citrus seed – 2 to 40 embryos
	Sporophytic budding – Opuntia

Solution :

(B)

Mango– Adventive embryony

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Question : 7

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Which of the following cells participate to develop extra embryos in mixed polyembryony?
 

Options:

	Synergids
	Oosphere
	Antipodal cells
	More than one option is correct

Solution :

(D)

Both (1) & (3)

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Question : 8

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Read the both statements carefully:
(a) Seed of orange has many embryos of similar sizes and shapes
(b) If the hybrids are made into apomicts, there is no segregation of characters in the hybrid progeny
 

Options:

	Both (a) & (b) are correct
	Only (a) is correct
	Both (a) & (b) are incorrect
	Only (b) is correct

Solution :

(D)

Many embryos of different sizes and
shares

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Question : 9

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Which of the following process is a form of asexual reproduction that mimics sexual reproduction?
 

Options:

	Amphigony
	Apomixis
	Amphimixis
	Syngenesis

Solution :

(B)

Sexual reproduction or amphigony or
amphimixis or syngenesis

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Question : 10

(skipped)

Diploid embryo sac develops directly from the nucellar cell in
 

Options:

	Apospory
	Aplospory
	Diplospory
	Apogamy

Solution :

(A)

Non-recurrent agamospermy (Aplospory)