Question # 1

Aerobic respiation takes place in.

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Mitochondria

Chloroplast

Nucleus

Blood vessels

The organism that live inside the body of host are called.

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Ectoparasite

Endoparasite

Host

Pathogen

The ... prevents food from entering the trachea.

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Glottis

Epiglottis

Bronchi

Alveoli

The products of respiration are carbon dioxide and.

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Water

Oxygen

Mitochondria

Chloroplast

------------- in mouth has antiseptic property and kills microogansms in food.

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Tongue

Teeth

Saliva

Trachea

The weight of an object of mass 1 kg on Earth surface is

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1 N

10 N

100 N

1000 N

Dolphins can hear sound underwater from up to ............ away

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15 km

20 km

25 km

30 km

During combustion, a substance reacts with

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Hydrogen

Water

Oxygen

Carbon di oxide

Irigation has methods.

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One

Two

Three

Four

What is required for photosynthesis in addition to light.

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Oxygen and carbon dioxide

Oxygen and water

Carbon di oxide and water

Notrogen and water

The tides are highest during.

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Day tides

Night tides

Spring tides

Tides due to Moon only

The central part of an atom is called.

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Electron

Proton

Neutron

Nucleus

An object produce a sound with a frequency of 50 Hz. Find its tiem period.

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0.01 sec

0.03 sec

0.02 sec

0.04 sec

Speed of sound in water is

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1000 ms-1

1500 ms-1

900 ms-1

2000 ms-1

How many atoms orm one molecuel of chlorine.

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1

2

3

4

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