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Classification of Animal Kingdom MCQs for NEET — Zoology Questions with Answers

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Phylogenetic classification systems based on

A. Evolutionary relationships between the various organism B. Organisms belonging to the same taxa may have a different ancestor C. Both A and B D. Based on cytological information like chromosome number, structure, behavior.

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Explanation

Page number-30

Introduction

Plant Kingdom

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If we want to know evolutionary relationships between organisms then which classification will resolve it :

A. Artificial classification B. Natural classification C. Cytotaxonomy D. Phyogenetic classification

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Explanation

Page number-30

Introduction

Plant Kingdom

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Homeostasis is

tendency to change with change in environment

tendency to resist change

disturbance in regulatory control

plants and animals extracts used in homeopathy

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Explanation

(b) Homeostasis Ghomes similar, (Gr. homeos = similar, stasis-standing) is the tendency of maintaining a relatively stable internal physiological environment in an organism, or steady-state equilibum in a population or ecosystem. It is carried out by regulatory mechanisms which coordinate internal fuctions such as providing nutrients to cells and transporting substances.

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Many freshwater animals cannot live for long in sea water and vice versa because of:

Buoyancy related problems

Lack of impermeable skins

Thermolabile enzymes

Osmotic considerations

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Explanation

4. Read page 222, XII NCERT

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When exposed to cold temperatures, which of the following is responsible for maintaining constant body temperature in humans?

Vasoconstriction and shivering

Vasodilation and shivering

Vasodilation and sweating

Vasoconstriction and sweating

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Explanation

1. Read page 224, XII NCERT

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Under unfavorable conditions, many zooplankton species in lakes and ponds are known to enter a stage of suspended development called as:

Dormancy

Hibernation

Aestivation

Diapause

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Explanation

4. Read page 225, XII NCERT.

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Very small animals are rarely found in polar region mainly because:

Smaller animals have a relatively slower heart rate

Smaller animals have a more surface area relative to their volume

Smaller animals are invariably herbivores

Smaller animals rely on diffusion for exchange of gases with the environment

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Explanation

Answer 2. Read page 224, XII NCERT

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Reptiles and birds are:

Oviparous

Viviparous

Ovoviviparous

Viviparous and oviparous respectively

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Explanation

Fact. Page no.16

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Eggs and Sperm are produced by the same individual in case of

Leech

Sponges

Pleurobrachia

All of the above

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Explanation

Monoecious or hermaphrodite are those organisms which have both male and female reproductive parts in the same body

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The digestive system in Meandrina is

Digestion is extracellular only

Digestion is intracellular only

Digestion is both extracellular and intracellular

Digestion absent as it is a parasite

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Explanation

in case of coelenterates digestion is both extracellular and intracellular.

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