Zoology XII+ - Reproduction in Organism 03

Question : 1

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Choose odd one w.r.t sexuality in given organisms

Options:

	Frog
	Human
	Cockroach
	Earthworm

Solution :

Earthworms are monoecious or hermaphrodite animals

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Question : 2

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Given below is a diagrammatic representation of two animals labelled as A and B

Choose the option which includes animal that is monoecious and has external fertilisation

Options:

	A only
	B only
	Both A and B
	Only B but the condition is variable according to season

Solution :

Earthworms have external fertilisation

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Question : 3

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Which of the following structure is considered as vital link that ensures continuity of species between organisms of one generation and the next?

Options:

	Sperm
	Ova
	Zygote
	Unfertilised egg

Solution :

Zygote is vital link that ensures continuity of species

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Question : 4

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When the female gamete undergoes development to form new organisms without fertilisation . This phenomena is called parthenogenesis. When only male members are produced by this process, it is called as         a        and is present in         b         .

Options:

	1
	2
	3
	4

Solution :

In arrhenotoky, male members are produced by parthenogenesis e.g. honey bee

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Question : 5

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Choose the correct set of animals in which fertilization is internal i.e. occurs inside the female body.

Options:

	Bony fishes, cartilaginous fishes and frogs
	Reptiles, birds and bony fishes
	Reptiles, frog and mammals
	Reptiles, birds and mammals

Solution :

Reptile, birds and mammals have internal fertilization

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Question : 6

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Formation of the diploid zygote is universal in all

Options:

	Sexually reproducing organisms
	Asexually reproducing organisms
	Organisms reproducing by parthenogenesis
	All of these

Solution :

Formation of diploid zygote is universal in all sexually reproducing organism

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Question : 7

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Which of the following is considered as a major disadvantage of external fertilisation?

Options:

	Organisms exhibiting external fertilization show great synchrony between sexes
	In external fertilization, syngamy occurs in external medium (water)
	Offspring are extremely vulnerable to predators threatening their survival up to adult hood
	Both (1) & (2)

Solution :

Offspring are extremely vulnerable to predators threatening their survival up to adulthood is a major disadvantages of external fertilization

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Question : 8

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Choose the incorrect statement

Options:

	Embryonal protection and care are better in oviparous organisms
	In reptiles and birds, the fertilized eggs covered by hard calcareous shell are laid in a safe place in the environment
	During embryogenesis, zygote undergoes only cell differentiation
	Both (1) & (3)

Solution :

Embryonal protection and care are better in viviparous animals

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Question : 9

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Choose the correct set which includes only monoecious animals

Options:

	Earthworm, tapeworm, cockroach
	Earthworm, Leeches, tapeworm
	Earthworm, sponges, cockroach
	Earthworm, sponges, human

Solution :

Earthworm, leeches, tapeworm and sponges are monoecious animals

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Question : 10

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Choose odd one w.r.t whether the development of zygote takes place outside the body of female parent or inside the body

Options:

	Lizards
	Snakes
	Bony fishes
	Mammals

Solution :

Mammals are viviparous while reptile, birds and bony fishes are oviparous