Tag: biology

Questions Related to biology

A curved bone is structurally designed to

biology skeleton, joints and muscles skeleton our skeletal system and the skin skeleton - movement and locomotion

  1. Accommodate easily in body

  2. Absorb the stress of the body weight at several different points so that the stress is evenly distributed

  3. Provide more area for attachment of muscles

  4. All of the above

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Correct Option: B
Explanation:

 Long bones are longer than they are wide and they are slightly curved for strength.
– A bone that is curved is structurally able to absorb the stress of the body at several points so the stress will be evenly distributed.
– The straight bone would not be able to evenly distribute the weight of the body and the bone would break more easily.
– Long bones are shaped like tubes with rounded ends that are designed to fit into other bones to form joints.
– The ends of long bones are filled with spongy bone; this makes them light but strong.
– Long bones can be found in the thigh, lower leg, toes, arms, forearms and fingers.

Which of the following has a sigmoid notch?

biology skeleton, joints and muscles skeleton our skeletal system and the skin skeleton - movement and locomotion

  1. Radius-ulna

  2. Humerus

  3. Tibia-fibula

  4. Femur

Show answer
Correct Option: A
Explanation:

(A) Radius-ulna has a sigmoid notch.

(B) Humerus has a trochlear notch.
(C) Tibia fibula has a fibular notch.
(D) The femur has an intercondylar notch.
So, the correct option is 'Radius-ulna'.

As one goes up from earth's surface, the temperature of air:

biology properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

  1. increases

  2. decreases

  3. first increases and then decreases

  4. first decreases and then increases

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Correct Option: D

Fog can be defined as:

biology properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

  1. Smoke from cigarette

  2. Polluted air from vehicles

  3. Clouds forming close to the ground

  4. A combination of smoke and dust particles

Show answer
Correct Option: C
Explanation:

Fog is a thick cloud of tiny water droplets suspended in the atmosphere at or near the earth's surface which obscures or restricts visibility.

Which of the following statements is true regarding the properties of air?

biology properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

  1. It is a good conductor of electricity

  2. It is a good conductor of heat

  3. It is translucent in nature

  4. None of these

Show answer
Correct Option: D
Explanation:

Air is a good conductor of heat.

It is a good conductor of electricity.
It is translucent in nature.
Hence, option $(D)$ is the answer.

Which of the following can show the direction of wind ?

biology properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

  1. Anemometer

  2. Wind wane

  3. Wind mill

  4. Barometer

Show answer
Correct Option: B
Explanation:

Anemometer: Used to measure the speed of the wind.


Wind wane: Used to show the direction of wind.


Windmill: Converts wind energy to rotational energy.

Barometer: Used to measure atmospheric pressure. 


Hence, option B is correct.

Which of the following is not true about air?

biology properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

  1. air can be separated into components

  2. it can be liquefied

  3. liquid nitrogen has a b.p of $-196^\circ C$

  4. air has a chemical formula

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Correct Option: D
Explanation:

The statement which is not true about air is that it has a chemical formula. Air has no chemical formula. It is a mixture of gases.

Air can be separated into components by:

biology properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

  1. filtration

  2. distillation

  3. fractional distillation

  4. any of the above

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Correct Option: C
Explanation:

The method used to separate air into its components is by fractional distillation.

Which of the following is not true about air?

biology properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

  1. air has no chemical formula

  2. air can be separated

  3. air has no specific set of properties

  4. air has fixed composition

Show answer
Correct Option: D
Explanation:

Air has a variable composition. The other options are true regarding air.

Which gas in the air is essential for burning of wood?

biology properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

  1. nitrogen

  2. hydrogen

  3. oxygen

  4. helium

Show answer
Correct Option: C
Explanation:

Oxygen is required for burning or combustion to take place.