Question # 1

The autosomal non disjunction in man in which 21st pair of chromosome fail to segregate resulting in gametes with 24 chromosomes is.

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Down's syndrome

Klinfilter syndrome

Turner's syndrome

Jacob's syndrome

The part of human limbic system.

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Amygdata

Cerebrum

Thalamus

Pons

A group of bacteria that can tolerate temperate upto 120 ^oC

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Eubacteria

Mycoplasma

Archaebacteria

E.Coli

The average cell cycle in human is.

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24 hours

26 hours

28 hours

30 hours

Repeating units of DNA are called.

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Histones

Nucleosides

Nucleotides

Amino acids

Kohler used chimpanzee to prove

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Habituation

Imprinting

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The stage in which Lichens are just like crumpled leaves attached to one point.

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Moss stage

Crustose Lichen stage

Follage Lichen stage

Shrub stage

Action of the venus fly trap is

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Nyctinasty

Photonasty

Haptonasty

Thermonasty

Lutinizing hormone induces.

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Menstruation

Menopause

Ovulation

Oogenesis

The total energy from the sun is happened by the producers in an ecosystem is about?

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20 %

10 %

5 %

1 %

In oceans especially in tropical regions temperature of surface water is about

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10^oC

15^oC

25^oC

35^oC

The kinetochore fibres of spindle attach to the kinetochore region of chromosome and align them at the equator of the spindle forming

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Equatorial plate

Metaphase plate

Central plate

Both a & b

Which strand of DNA is transcribed.

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coding strand

Sense strand

Antisense strand

Conservative strand

Blood supplied to kidneys from each cardiac beat is.

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10%

20%

30%

50%

The Limbic system is located between thalamus and

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Hypothalamus

Cerebrum

Pons

Cerebellum

The zone, rich in life, in a fresh water lake is called.

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Littoral zone

Profundal zone

Limnetic zone

Deseret

Cytokinins delay the aging of fresh leaf crops such as cabbage and lettuce as well as keeping flowers

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Attached

Fresh

Delayed

Open

Movement of rearrangement of the cells in the embryo is called.

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Cleavage

Gastrulation

Fertilization

Organogenesis

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