Tag: biology

Questions Related to biology

National Space Center for "Megha-Tropiques Mission" to study the water cycle in the tropical atmosphere in the context of climate change is located in which country?

biology physical resources air and winds wind energy air as a natural resource

  1. Italy

  2. France

  3. Germany

  4. Poland

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Correct Option: B

World climate is threatened by increase in atmospheric concentration of

biology physical resources air and winds wind energy air as a natural resource

  1. Oxygen

  2. Nitrogen

  3. Water vapours

  4. Carbon dioxide

  5. Both C and D

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Correct Option: E
Explanation:

The major greenhouse gases are water vapour, which causes about 3670% of the greenhouse effect; carbon dioxide (CO$ _2$), which causes 926%; methane (CH$ _4$), which causes 49%; and ozone (O$ _3$), which causes 37%. Water vapour is the most abundant greenhouse gas, it acts as a feedback to the climate. Water vapour increases as the earth's atmosphere warms, making these the most important feedback mechanisms to the greenhouse effect. Carbon dioxide is released through natural processes such as respiration and volcano eruptions and through human activities such as deforestation, land use changes, and burning fossil fuels. This is the most important long-lived cause of climate change.

Therefore, the correct answer is option C and D.

A permeable rock that contains hydrocarbon fluids and gasses is called a/an

biology habitat and adaptation terrestrial adaptations in plants desert ecosystem adaptation in terrestrial plants

  1. Oil trap

  2. Source bed

  3. Oil reservoir

  4. None of these

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Correct Option: C

Which of the following is an important adaptation of animals too the cold climate?

biology habitat and adaptation terrestrial adaptations in plants desert ecosystem adaptation in terrestrial plants

  1. Thin layer of body fat

  2. Aestivation

  3. Increased tendency to shivering

  4. Reduced surface area to volume ratio

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Correct Option: D
Explanation:

Temperature affects the the absolute size of an animal and the relative proportions of various body parts, Birds and mammals attain grater body size in cold regions than in warm areas. But poikilotherms are smaller in cold region. This is Bargeman's rue. This is true because small animals have larger surface area relative to their volume, so if they are in cold, they lose their body heat very fast. In cold climate, reduced surface area to volume ratio is ideal. So, the correct answer is 'Reduced surface area to volume ratio'.

Which of the following is not an important adaptation of animals to cold climate?

biology habitat and adaptation terrestrial adaptations in plants desert ecosystem adaptation in terrestrial plants

  1. Thin layer of body fat

  2. Aestivation

  3. Increased tendency to shiver

  4. Reduced surface area to volume ratio

Show answer
Correct Option: B
Explanation:

The animals living in cold climate have various physiological adaptations like:

1) A thick layer of body fat called as Blubber to avoid loss of heat from body tissue.

2) Hibernation is a property of suspended metabolism in these organisms to surpass cold conditions.similar mechanism called aestivation exists in desert animals to survive in arid and hot conditions.

3) Increased tendency to shiver causes an increase in body temperature because of exercise thus help to withstand low temperatures.

4) The reduced surface area to volume ratio to prevent heat loss from the body surface. So, the correct answer is 'Aestivation'.

Animals living in cold regions have?

biology habitat and adaptation terrestrial adaptations in plants desert ecosystem adaptation in terrestrial plants

  1. legs to run fast

  2. fat for additional insulation

  3. long necks

  4. long eye lashes

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Correct Option: B
Explanation:

Animals that live in colder areas have to protect their bodies against extremely cold environmental conditions. Their bodies cannot withstand such cold climates. So, they have a thick white fur over their bodies. This provides an additional layer over their skin. As a result, the air gets trapped in this layer and it cannot pass through it, keeping their bodies insulated against the excessive cold.

So, option B " fat for additional insulation" is the correct answer.

Which of the following is true?

biology water a precious resource sources of water and water cycle availability and forms of water the water cycle

  1. The gaseous form is the water vapour present in the air around us.

  2. The liquid form is the water vapour present in the air around us.

  3. The gaseous form is the water vapour present in the river.

  4. The gaseous form is the water vapour present at the poles of the earth.

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Correct Option: A
Explanation:

The gaseous form is the water vapor present in the air around us.

Liquid water is present in ______________.

biology water a precious resource sources of water and water cycle availability and forms of water the water cycle

  1. oceans

  2. lakes

  3. rivers

  4. oceans, lakes, rivers, and even underground.

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Correct Option: D
Explanation:

Liquid water is present in oceans, lakes, rivers, and even underground.

Which of the following is true?

biology water a precious resource sources of water and water cycle availability and forms of water the water cycle

  1. The continuous cycling of water among its three forms keeps the total amount of water on the earth constant even when the whole world is using it.

  2. The continuous cycling of water among its three forms cannot keep the total amount of water on the earth constant even when the whole world is using it.

  3. The continuous cycling of water among its three forms decreases the total amount of water on the earth when the whole world is using it.

  4. The continuous cycling of water among its three forms keeps the total amount of water on the earth constant only if the whole world is not using it.

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Correct Option: A
Explanation:

The continuous cycling of water among its three forms keeps the total amount of water on the earth constant even when the whole world is using it.

When water circulates through the water cycle it can be found in the

biology water a precious resource sources of water and water cycle availability and forms of water the water cycle

  1. Solid form.

  2. Liquid form.

  3. Gas form.

  4. All of the above.

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Correct Option: D
Explanation:

When water circulates through the water cycle it can be found in all the three forms, i.e., solid, liquid and gasat any given time somewhere on the earth.