Class 5 EVS Chapter 1 HOTS Questions - Super Senses

Q1: Sloth remains awake for:
(a) 7 hours a day
(b) 17 hours a day
(c) 20 hours a day
(d) 2 hours a day
Ans: (a)
Sloth has a very low metabolic rate, it sleeps a lot. It sleeps around 15-18 hours a day. A sloth can lower its heart beat rate. After garden snail, sloth is the slowest animal.
So, the correct option is '7 hours a day'.

Q2: Which of the following animal sleeps most of the time during the winter season?
(a) Sloth
(b) Dog
(c) Lizard
(d) Cat
Ans: (c)
There are two kinds of organisms: regulators and conformers.
Regulators are those who can maintain their internal body temperature according to the external environment. Example: dog, cat, sloth etc.
Conformers are the organisms that can not maintain internal body temperature according to the environment so they need sleep during harsh climates to survive. Example: lizards, polar bear.
So, the correct option is 'Lizard'.

Q3: The total sleeping time of newborn baby is
(a) 20 hours a day
(b) 10 hours a day
(c) 16 hours a day
(d) None of the above
Ans: (c)
Newborn baby sleeps up to 16-17 hours a day. One of the reasons behind what appears to be excessive babies' sleep is the fact that the baby is still adjusting to a new environment, and experiencing a rapid bit of growth at the same time. Proper development demands that babies sleep a lot.
Hence, the correct answer is C.

Q4: The animal that sleeps for the longest duration among the following is?
(a) Lizard
(b) Horse
(c) Python
(d) Dog
Ans: (c)
A lizard generally sleeps around 60-80 seconds but its longest sleep can be 4 hours.
A horse can sleep up to 3 hours a day.
A python being the longest sleeping animal can sleep around 2 weeks continuously.
A dog sleeps between 12 and 14 hours per 24-hour cycle.
So, the correct option is 'Python'.

Q5: Flavour is a sense of:
(a) Taste
(b) Smell
(c) Touch
(d) Both A and B
Ans: (d)
Flavour is a combination of taste and smell while eating or sipping.
Flavour is detected with the help of the tongue and nose.
Thus the correct answer is option D.

Q6: Unihemispheric sleep is the sleeping patterns in which
(a) Animal sleeps for five hours
(b) Sleep with just one-half of their brain, while the other half remains alert for predators
(c) Animals hibernate
(d) Animals aestivate
Ans: (b)
In Unihemispheric sleep, also known as asymmetric slow-wave sleep, one half of the brain is in deep sleep, and the eye corresponding to this half is closed while the other half remains alert and one eye remains open. It keeps the organism alert for predators.
So, the correct option is B.

Q7: Which of the following shows aestivation?
(a) Bees
(b) Sparrow
(c) Rat
(d) Cat
Ans: (a)
Aestivation is the type of summer sleep, performed by cold-blooded animals. It helps in maintaining the body temperature by avoiding the excessive water loss and any internal body damaged due to high temperatures.
It is performed by bees, snails, earthworms, salamanders, frogs, earthworms, crocodiles, tortoise, etc.
So, the correct option is A.

Q8: The lizards go for winter sleep because
(a) They are cold blooded
(b) They are warm blooded
(c) They have the capability of homeostasis
(d) None of the above
Ans: (a)
Lizard being a reptile is a cold-blooded animal.
Cold-blooded refers to the ability of an organism to change its body temperature with respect to the surrounding.
During the extremely cold, lizards face the danger of either their blood freezing up or their temperature dropping drastically, as a result of which they become immobile and can easily fall prey to enemies.
Hence, lizards hibernate in cracks of walls or beneath the soil to conserve energy and to avoid predators.
So, the correct option is A.

Q9: The animal which hangs upside down from tree branches is:
(a) Sloth
(b) Baboon
(c) Rhesus Monkey
(d) Gibbon
Ans: (a)
Sloths are arboreal mammals that move at a very slow pace. They spend most of their lives hanging upside down from trees. In accordance with their slow speed of action, their metabolism is also very slow.
So, the correct answer is "Sloth'.

Q10: Which of the following animal is active only during night?
(a) Bat
(b) Crow
(c) Fish
(d) Cat
Ans: (a)
Nocturnal animals are animals that sleep during the day and become active at night. Example - bat, owl and firefly, etc.

Q11: Sleeping time of sloth is:
(a) 6 hourr
(b) 5 hours
(c) 17 hours
(d) None of the above
Ans: (c)
Sleeping time of sloth is 15 to 18 hours per day.
So the correct option is C.

Q12: How many hours a cow sleep in a day?
(a) 5-8 hours
(b) 3-4 hours
(c) 10-15 hours
(d) 20 hours
Ans: (b)
Cows usually sleep around 3-4 hours a day. But it doesn't happen in a single go, but instead for shorter periods of time.
A cow takes frequent naps throughout the day and especially the night, which typically last between one and five minutes at a time.
So, the correct option is B.

Q13: We do not sense any pain when we clip our nails or cut our hair. Why?
(a) They are made up of dead cells.
(b) These parts cannot respond to touch.
(c) They can tolerate pain.
(d) None of these.
Ans: (a)
Our nails and hair are made up of dead cells and these dead cells are devoid of nerves. So the impulses cannot be supplied to the brain and response is not produced. That is the reason why we do not sense any pain when we clip our nails or cut our hair.
Most of the part of nails and hair is made up of dead cells and only the base part has living cells which have nerve supply.
Hence the correct option is option A.

Q14: Which of the following is called as aestivation?
(a) Sleeping in winter
(b) Sleeping in summer
(c) Sleeping in Autumn
(d) None of the above
Ans: (b)
Aestivation is a state of prolonged sleep during summer, exhibited by certain animals in response to high temperature and arid conditions. Example - frogs and toads, bees, salamander, etc.
So the correct option is B.

Q15: Identify the animal with shortest sleeping time.
(a) Sloth
(b) Crocodile
(c) Cow
(d) Giraffe
Ans: (d)
Giraffes have the shortest sleep requirements of any mammal, with an average of just 30 minutes per day. They sleep in a reclined position with their long necks curled right round and their heads resting on their rears.
So, the correct option is D.