Tag: evs

Questions Related to evs

Which of the animal possess split tongue?

evs snakes a snake charmer's story snakes and snake charmers uses of animals

  1. Lion

  2. Dog

  3. Frog

  4. Snake

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Correct Option: D
Explanation:

Snakes possess split tongue. It is thought to be advantageous because it allows the snake to smell in three dimensions. Since the two tips pick up odors from slightly different locations in space, the snake can detect the direction of the source of the smell.

So, the correct option is 'Snake'.

In which of the following animals, snake venom is not effective?

evs snakes a snake charmer's story snakes and snake charmers uses of animals

  1. Lizard

  2. Rat

  3. Mangoose

  4. Jackal

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Correct Option: C
Explanation:

Mangoose are immune to the snake venom. It is because the acetylcholine receptors of mangoose render them resistant or immune to snake venom primarily composed of neurotoxin. Due to this the snake's venom fails to react the way it normally does to animals who are not immune to the venom.

So, the correct option is 'Mangoose'.

The scaly skin of snakes 

evs snakes a snake charmer's story snakes and snake charmers uses of animals

  1. Protects them from drying.

  2. Scares human beings.

  3. Makes them beautiful.

  4. All of the above.

Show answer
Correct Option: A
Explanation:

The scaly skin of snakes plays a lot of different functions. Snakes are food for animals like eagles, hawks or foxes and to protect themselves from these animals, snakes have scales. These scales are thick and prickly, which makes it difficult for animals to bite or injure them. Other than protection from animals, scales also protect snakes from harmful sun rays and decreases water loss. Hence, scales protect snakes from dying due to multiple reasons.

Which of the following snakes kills its prey by constriction?

evs snakes a snake charmer's story snakes and snake charmers uses of animals

  1. Banded bait

  2. Python

  3. Viper

  4. Rat snake

Show answer
Correct Option: B
Explanation:
The Pythonidae, commonly known simply as pythons, are a family of nonvenomous snakes found in Africa, Asia, and Australia. Among its members are some of the largest snakes in the world. Eight genera and 31 species are currently recognized. A constricting snake like python kills its prey by suffocation. It uses the momentum of its strike to throw coils around its victim’s body. Then, it squeezes. Every time the prey exhales, the snake squeezes a little more tightly. Soon, the victim can breathe no more.
So the correct option is 'python'.

The largest reservoir of nitrogen on Earth is 

evs atmosphere- wind importance of oxygen is air present everywhere around us? air as a natural resource

  1. Soil

  2. Air

  3. Oceans

  4. Rocks

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Correct Option: B

Rising air cools by this process:

evs atmosphere- wind importance of oxygen is air present everywhere around us? air as a natural resource

  1. Expansion

  2. Evaporation

  3. Compression

  4. Condensation

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Correct Option: A

Sinking air warms by this process:

evs atmosphere- wind importance of oxygen is air present everywhere around us? air as a natural resource

  1. Compression

  2. Expansion

  3. Condensation

  4. Friction

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Correct Option: A

How many grams of air in a liter?

evs atmosphere- wind importance of oxygen is air present everywhere around us? air as a natural resource

  1. 1.5 gm

  2. 1.3gm

  3. 1.2gm

  4. 7gm

Show answer
Correct Option: B

Which of the following statement is true?

evs atmosphere- wind importance of oxygen is air present everywhere around us? air as a natural resource

  1. Hot air expands on heating.

  2. Hot air contracts on cooling.

  3. Cold air contracts on heating.

  4. None of the above.

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Correct Option: A
Explanation:
Air is a mixture which is composed of several gases like oxygen 21%, nitrogen 78%, carbon dioxide 0.03% and water vapors. The air molecules are held by strong intermolecular forces. When air is heated up, the air molecules absorb the heat and the intermolecular forces between the air molecules become weak and its kinetic energy increases. The air molecules move apart and become less dense and thus they expand on heating.
So, the correct answer is option A.

Choose the correct answer from the alternatives given.
The largest reservoir of nitrogen on earth is:

evs atmosphere- wind importance of oxygen is air present everywhere around us? air as a natural resource

  1. soil

  2. oceans

  3. air

  4. granite rocks

Show answer
Correct Option: C
Explanation:

It is true that 70% or so of the Air is nitrogen but that it needs to be the largest reservoir. Nitrogen is an essential part of most living organisms. Most of the bodily fluids and enzymes have nitrogen in a bonded form. This is true even in the case of plants. So, the correct answer is "Air".