Biology - Mock Test 43

Question 421

Exponential growth of cells is a characteristic feature of

A) tissue culture cells B) multicellular organisms C) unicellular organisms D) embryo

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Question 422

During regeneration, modification of an organ to other organ is known as

A) Morphogenesis B) Epimorphosis C) Morphallaxis D) Accretionary growth

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Question 423

What is true for cleavage

A) Size of embryo increases B) Size of cells decrease C) Size of cells increase D) Size of embryo decreases

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Question 424

What is common between vegetative reproduction and apomixis

A) Both are applicable to only dicot plants B) Both bypass the flowering phase C) Both occur round the year D) Both produce progeny identical to the parent

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Question 425

Which type of stimulus is used to achieve parthenogenic development

A) Chemical B) Change in pH C) Pricking with microneedle D) All the above

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Question 426

When more than one sperm establish contact and penetrate into the egg, then it is called

A) monospermy B) polyspermy C) both a and b D) none of these

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Question 427

The size of the egg chiefly depends upon the

A) size of the animal B) amount of yolk reserves in it C) amount of food taken by the mother D) all the above

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Question 428

A sperm without acrosome, cannot

A) get food supply B) move C) penetrate into the seminal vesicle D) penetrate into the ovum

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Question 429

The final event in the process of fertilization is

A) structural change in male and female gametes B) egg activation C) amphimixis D) organizational change in egg cytoplasm

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Question 430

One of the minute cell which separates from the animal egg during maturation is known as

A) primary spermatogonia B) secondary oogonia C) primary oogonia D) polar bodies

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