Question # 1

Testosterone is secreted by

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Sertoli cells

Interstitial cells

Prostrate gland

Germinal epithelium

Homologous structures represent.

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Convergent evolution

Analogy

divergent evolution

Functional similarity

Who proposed the term 'Niche' in ecology.

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Haeckel

Grinnell

Elton

Darwin

The arctic tundra stretches acroos Northern North America, Northern Europe and.

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cyprus

Siberia

Morocco

Nepal

Nitrogen waste which is highly toxic and dissolves quickly in body fluids is.

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CO2

Urea

Ammonia

Uric Acid

Which light enhance cell division and retards cell enlargment.

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Red

Green

Blue

Violet

In root nodules, the organisms present are.

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Bacteria

Algae

Fungi

Cyapobacteria

Which organ is the central station of Metabolism.

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Liver

Kidney

Spleen

Skin

Endosymbiont hypothesis was proposed by.

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Wallace

Lamarck

Lynn Margulis

Linnaeus

Primer for PCR contains about.

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5 bases

10-20 bases

30 bases

40 bases

The corpus luteum is formed at the site of

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Fertilization

Ovulation

Mensturation

Implantation

The membrane that bounds vacuole is called.

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Tonoplast

Leucoplat

Chromoplast

Chloroplast

Hardy Weinberg's theorem describes the frequencies of genotype of non evolving.

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Family

Population

Species

Community

Which evemt si not associated with the activity of expiration?

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Contraction of diaphragm

More dome like shape of diaphragm

Back ward& downward movement of rib cage

Relaxation of intercoastals muscles

Hatching period of chick is.

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15 days

18 days

21 days

28 days

The pairing of homologous chromosomes is completed in

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Leptotene

Zygotene

Pachytene

Diplotene

A chromosome with unequal length of its arm is called:

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Metacantric

Sub metacentric

Acrocentric

Telocentric

In neurons the message is transmitted across synapse in the form of chemical messenger called.

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Nerve impulse

Synaptic vesicle

Neurotransmitters

Communlaction

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