CBSE Questions for Class 7 Biology Weather Climate And Adaptations Of Animals To Climate Quiz 1 - MCQExams.com

• Warm ocean currents heat the air above the oceans. 
• They then carry this hot air upwards, as hot air is lighter in weight.  
• Thus, lands near oceans get warmer due to warm air. 
• This warm air then condenses as it goes upwards and then it brings rainfall and humidity.

• All living organisms have the ability to adjust and adapt according to their surroundings.
• Animals living in extremely cold climatic conditions have to protect themselves from the cold weather. So they have a thick layer of fur over them. As the layer of fur blocks the cold air and prevents it from reaching the animal's body, it will protect them against cold. 
• Similarly, a thick layer of fat over their body also causes insulation and protects the animal from extreme cold. So, both of these are adaptations against cold.
• Most of the animals exhibit a period of inactivation, where they are in a state of dormancy. Hibernation is the state of inactivity in winter to avoid cold temperatures.
• All these 3 options are characteristics of animals for adapting themselves against extreme cold.
• A thin layer of hair over their bodies will not provide enough protection against environmental cold and so it is not a characteristic that protects them.

Sun is the main source of energy that causes changes in the weather. Sun energy is the source of all heat and light on the earth. Energy absorbed and reflected by the earth’s surface, oceans and the atmosphere play important roles in determining the weather at any place.

Solution

Correct answer is option C.

Explanation for correct option:

• Humidity is the concentration of water vapour present in the air.
• Water vapor is the gaseous state of water, and is generally invisible to the human eyes.
• Hot places tend to be more humid than cool places because heat causes water to evaporate faster.

• The eagle has very specially adapted large, clawed feet which are known as talons. The talons of the eagle are powerful and strong and allow the eagle to catch prey or available food on the ground or in the water when the eagle is still in the air.
• The claws must be extremely strong and sharp. When an eagle catches a fish, those claws have to slice into a stiff, strong fish with thick scales protecting its body.
  
• So, the correct answer is 'Available food'.