Question # 1

The total gestation period in human female is usually about.

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280 days

280 week

28 months

360 days

Movement shown by sperms of liver Worts, mosses, forns towards archegonia is a.

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chemotactic movement

Photoactic movement

Chemotropic movement

Phototropic movement

The group of animals whose excretory system is structurally associated with nutritive tract.

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Vertebrates

Earthworm

Insects

Planaria

The process of moulting is controlled by the nervous system and a hormone called.

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Aldosterone

Ecdysone

Oxytocin

Androgen

About 500 ml water is needed to excrete 1g of ammonia

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Hydrogen

Oxygen

Nitrogen

Helium

DNA finger prints can also be used as

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Crime evidence

Forensic evidence

Litigation evidence

Offence evidence

Opening of flower bud follows.

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Photonasty

Hyponasty

Epinasty

Haptonasty

The main transmitter for synapses that lie outside the central nervous system is

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Adrenaline

Acetylcholine

Serotonin

Dopamine

Flowering is induced in pineapple by growth hormone called.

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Gibbereiline

Abscisic acid

Ethene

Cytokinins

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

In which developmental stage, germ layers are formed.

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Cleavage

Blastula

Gastrula

Organogenesis

A form of air pollution in which airbone acids produced by electric utility plants and other sources fall to Earth in distant regions is

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Acid rain

Basic rain

Heavy rain

Drizzling

The first restriction enzyme was isolated by

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Kary mulis

Hamilton O. smith

Sagar

Maxam gilbret

Germ cells in the ovary produce many

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Spermatogonia

Zoospores

Zygospores

Oogonia

Who was the first to propose an objective definition of instincts in terms of animal behaviour

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Darwin

Lamarck

Wallace

Lyell

The earliest form of muscles to evolved is.

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Cardiac muscle

skeleton muscle

Smooth muscle

Involuntary muscle

The animals that lay shelled eggs to protect the developing embryo are called.

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Oviparous

Ovovlviparous

Viviparous

Egg laying mammals

Histones are positively charged due to an abundance of the basic amino acids

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Arginine

Lysine

Both a & c

Alanine

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