Question

With reference to the Snakes, consider the following statements :-
1. All snakes are diurnal.
2. All snakes are cold-blooded and must regulate their body temperatures.
3. All snakes shed their skin because it does not grow with their body size.

Which of the statements given above is/are correct?
(a) 2 and 3 only
(b) 1 and 3 only
(c) 2 only
(d) 1, 2 and 3​

Answer 1

Option A - 2 and 3 only

■ Explanation :-

• Snake :- There are more than 35,000 species of the snake around the world, of which only 600 are venomous. Of these 600, 330 species are found in India. The most commonly found dangerous snakes are the ones we call the big four — krait, Russel’s viper, saw-scaled viper and Indian-spectacled cobra.

• Snakes have some clear differences from other reptiles. They have no limbs, no moveable eyelids, and no ear openings. About 600 species are venomous, and only about 200—seven percent—are able to kill or significantly wound a human.

• Their upper and lower jaw separate to allow snakes to consume prey up to three times larger than the diameter of their head. Snakes eat their prey whole.

• Most snakes are nocturnal. Hence, statement 1 is not correct. Their tongue is used to smell their air.

• Snakes are cold-blooded, or ectotherms, and must sun themselves to regulate their body temperatures. Hence, statement 2 is correct.

• While most snakes lay eggs, some give live birth. Snakes shed their skin because it doesn't fit anymore or because it's old or worn out. When snakes grow, their skin does not, so they outgrow it. When this happens, they shed their outer layer of skin. Snakes can shed their skin as often as once a month, although it's usually only a handful of times a year at most. Hence statement 3 is correct.

• There are more than 3,000 species of snakes on the planet and they’re found everywhere except in Antarctica, Iceland, Ireland, Greenland, and New Zealand. They live almost everywhere, in deserts,forests, oceans, streams, and lakes. Snakes cannot survive in places where the ground stays frozen year-round so there are no snakes in Antarctica. Radio telemetry has been used to study the movement patterns of snakes to tackle India‘s huge snakebite problem.

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Answer 2

Answer:

(c) 2 only

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