Question # 1

The cross which is used to find out the homozygous or heterozygous nature of the genotype is called.

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Test cross

Reciprocal ross

Monohybrid corss

Dihybrid cross

The idea of endosymbiont was purposed by.

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Cuvler

Lyell

Malthus

Marglls

The Sclerenchyma has thick secondary walls usually impregnated with.

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Chitin

Pectin

sillica

Lignin

In aquatic ecosystem , near shore zone is called.

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Limnetic zone

Littoral zone

Profundal zone

Benthic zone

Synapsis occurs duiring.

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Pachytene

Leptotene

Zygotene

Diplotene

Unlike most proteins, histones are.

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Positively charges

Neutral

discharged

Negatively charged

The sites where nerve impulse is transmitted from the nerve endings to the skeleton muscle cell membranes are the:

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Neucromuscular junctions

Sarcomeres

Myofilaments

Z discs

Excretory structure present in cockroach are.

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Contractile vacuole

Malpighian tubules

Nephridia

Flame cells

On the basis of structure and shape of the cap,two species of Acetabularia have been identified

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Acetabularia mediterrance & A.crenulata

A.typhi & A.mediterranea

A.crenulate & A.sisso

A.crenulata & A.arabica

On over the wound the cambium forms

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Callus

Wood tissues

Both a & b

Gall

Bowman capsule continues as extensively convoluted proximal tubule loop of henie and the distal tubule which empties into

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Collecting tubules

Malpighian tubules

Renal tubules

Neural tubules

The series of changes which involve period of growths replication of DNA followed ny cell division may be named as

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DNA cycle

Nuclear cycle

Cell cycle

Chemical cycle

If the amount of adenine in DNA of a bacterial cell is 36% of the total nitrogenous bases, what will be the amount of guanone in the DNA of a cell in next generations:

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14 %

28 %

36 %

64 %

Morphological characteristics of chromosome are collectively called.

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Holotype

Karyokinesis

Karyotype

Neotype

Lyell published the principle of.

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Population

Community

Geology

Blome

The means by which recombinant DNA is introduced into a host call is called

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Plasmid

Carrier

Vector

Lifter

According to endosymbiont hypothesis, the aerobic bacteria developed into.

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Ribosome

Lysosome

Mitochondria

Golgi apparatus

Mammals including human maintain their high body temperature within a narrow range of about

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30-32oC

36-38oC

32-36oC

35-37oC

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