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All questions of How Traits Change for Grade 8 Exam

Climate of a place do not depends on
  • a)
    Latitude
  • b)
    Wind
  • c)
    Humidity
  • d)
    Longitude
Correct answer is option 'D'. Can you explain this answer?

Palak Iyer answered
The factors that determine the climate of a place are:
· Latitude
· Altitude
· Winds
· Distance from the sea
· Humidity and Ocean Currents
Longitude is not a factor that determines the climate of a place.

Which of these is shown by humidity?
  • a)
    Rainfall
  • b)
    Carbon dioxide
  • c)
    Moisture
  • d)
    Air pollutant
Correct answer is option 'C'. Can you explain this answer?

Sonal Sarkar answered
Presence of moisture is shown by humidity. Higher the moisture content in air more will be humidity level.

Birds are adapted to fly because of 
  • a)
    Streamlined body
  • b)
    light bones 
  • c)
    feathers and wings 
  • d)
    all of these 
Correct answer is option 'D'. Can you explain this answer?

Mayank Roy answered
The bodies of birds are adapted for flying. Many of a bird's bones are hollow which makes birds' bodies lightweight. Flying birds have large chest muscles that move the wings.The long flight feathers on the wings and tail help birds balance and steer.

Which one is not an adaptation of camel for desert condition
  • a)
    It excrete very little of urine and dry dung.
  • b)
    Its feet are broad with paddy soles
  • c)
    It has hump which stores fat
  • d)
    It perspires a lot to keep the body cool
Correct answer is option 'D'. Can you explain this answer?

Akshara Das answered
Camels have many adaptations that allow them to live successfully in desert conditions. Deserts are hot and dry. Winds blow sand all around, so a camel has long eyelashes. It has nostrils that can open and close.

1. A camel can go a week or more without water, and they can last for several months without food. They can drink up to 32 gallons (46 litres) of water at one drinking session! 
2. Camels store fat in the hump, not water. The fat can be metabolised for energy.
3. Unlike most mammals, a healthy camel's body temperature fluctuates (changes) throughout the day from 34degC to 41.7degC (93degF-107degF.) This allows the camel to conserve water by not sweating as the environmental temperature rises.
4. Camels feet are wide so they can walk on sand more easily. Their huge feet help them to walk on sand without sinking into it.
5. Camels have thick lips so they can eat the prickly desert plants with out feeling pain.
6. The colour of their bodies helps them to blend into their environment.
7. Camel's ears are covered with hair, even on the inside. The hair helps keep out sand or dust that might blow into the animal's ears.

If there is a heavy rainfall on most of the days at a place, the climate of that place will be
  • a)
    Hot and wet
  • b)
    Cold and wet
  • c)
    Hot and humid
  • d)
    Cold and humid
Correct answer is option 'A'. Can you explain this answer?

Prisha Mehta answered
Meteorologists record the weather every day. The records of the weather have been preserved for the past several decades. These help us to determine the weather pattern at a place. The average weather pattern taken over a long time, say 25 years, is called the climate of the place. If we find that the temperature at a place is high most

of the time, then we say that the climate of that place is hot. If there is also heavy rainfall on most of the days in the same place, then we can say that the climate of that place is hot and wet.

Animal called ‘ship of desert’ is
  • a)
    Dog
  • b)
    Camel
  • c)
    Cat
  • d)
    Butterfly
Correct answer is option 'B'. Can you explain this answer?

Jithin Chawla answered
Camel is called as ship of desert because camel can move on sand of desert very easily due to presence of padded sole.

Cold blooded animals
  • a)
    Body temperature keeps always high
  • b)
    Keep their body temperature uniform
  • c)
    Change their body temperature with environment
  • d)
    Body temperature always remains less
Correct answer is option 'C'. Can you explain this answer?

Pooja Banerjee answered
Cold-blooded animals do not maintain a constant body temperature. They get their heat from the outside environment, so their body temperature fluctuates, based on external temperatures. If it is 50 degreeF outside, their body temperature will eventually drop to 50 degreeF, as well.

A long winter sleep of animals is called
  • a)
    Cold sleep
  • b)
    Aestivation
  • c)
    Hibernation
  • d)
    Deep sleep
Correct answer is option 'C'. Can you explain this answer?

Mainak Basu answered
Some animals undergo long winter sleep to avoid cold condition, called as hibernation. Organism survive without taking food and water.

The special features and habits that help an animal survive in its environment are known as _______
  • a)
    evolutions
  • b)
    adaptations
  • c)
    polymorphisms
  • d)
    hibernation
Correct answer is option 'B'. Can you explain this answer?

The special characteristics that enable plants and animals to be successful in a particular environment are called adaptations.
Animals have certain body features and habits that help them to live comfortably in their habitats. Such features and habits are called adaptations. Adaptations mainly help an animal get food and protect it from harsh weather.

Which of the following animals have ability to camouflage?
  • a)
    Lion
  • b)
    Grasshopper
  • c)
    Chemolean
  • d)
    Butterfly
Correct answer is option 'C'. Can you explain this answer?

The ability of organism to change its body colour or shape to mix with surrounding is called camouflage. Chamolean have ability to camouflage.

Fish uses which organ to breath in water?
  • a)
    Skin
  • b)
    Mouth
  • c)
    Lungs
  • d)
    Gills
Correct answer is option 'D'. Can you explain this answer?

Prateek Sharma answered
Fish contain gills as respiratory organ. A pair of gills present in head region is able to absorb oxygen dissolved in water.

Which of these provide Polar bear insulation against extreme cold
  • a)
    Pointed mouth
  • b)
    White fur
  • c)
    Fat layer
  • d)
    Huge size
Correct answer is option 'C'. Can you explain this answer?

Fat layer beneath the skin of polar bear provide insulation against extreme cold condition of polar region as fat prevents the heat loss from the body.

Average weather condition over a long period of time is called
  • a)
    Temperature
  • b)
    Humidity
  • c)
    Climate
  • d)
    Troposphere
Correct answer is option 'C'. Can you explain this answer?

Average weather condition over a long period of time is called Climate. Climate remains same over a long period of time.

The elements that do not determine the weather of a place is
  • a)
    Type of soil
  • b)
    Temperature
  • c)
    Rain
  • d)
    Humidity
Correct answer is option 'A'. Can you explain this answer?

Dipanjan Goyal answered
Type of soil do not determine the weather of a place but humidity, temperature and rain is responsible for weather condition.

Which one is marine organism?
  • a)
    Frog
  • b)
    Crocodiles
  • c)
    Sharks
  • d)
    Water bugs
Correct answer is option 'C'. Can you explain this answer?

Nitya Sen answered
Those organisms that live in sea or ocean water are called marine organism. Sharks live in oceans.

Toucans is big birds with long
  • a)
    Beaks
  • b)
    Feathers
  • c)
    Legs
  • d)
    ail
Correct answer is option 'A'. Can you explain this answer?

Rithika Roy answered
Toucans is a big birds with long beak to search prey from wood logs and stems of plants.

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