All Free Everyday Science MCQs with Answers

751. The Tree sends down roots from its branches to the soil is known as:___________?

• A. Oak
• B. Pine
• C. Banyan
• D. Palm

Explanation: The banyan develops aerial prop roots from its branches, and these roots grow down into the soil to provide support. Oak, pine, and palm do not characteristically form this network of hanging roots.

752. Bt seed is associated with:___________?

• A. Rice
• B. Wheat
• C. Cotton
• D. Oilseed

Explanation: Bt cotton is genetically modified to produce a toxin from Bacillus thuringiensis, which protects the crop against certain insect pests. Bt seed is therefore associated with cotton.

753. Keeping of Birds Called___________?

• A. Apiculture
• B. Aviculture
• C. Viniculture
• D. Viticulture

Explanation: Aviculture is the keeping and breeding of birds, especially domestic or captive birds. Apiculture concerns bees, while viniculture and viticulture concern grape cultivation and wine production.

754. The study of geographical areas, plants and animal distribution is called_________?

• A. Cosmetology
• B. Chorology
• C. Osteology
• D. Mycology

Explanation: Chorology studies the geographical distribution of organisms and the characteristics of particular regions. Mycology is specifically the study of fungi.

755. The coldest region of the Earth's atmosphere is__________?

• A. Exosphere
• B. Thermosphere
• C. Stratopause
• D. Mesopause

Explanation: The mesopause is the boundary at the top of the mesosphere and is generally the coldest part of Earth's atmosphere. Temperatures there can fall to about minus 90 degrees Celsius.

756. Places where the temperature of air is above freezing point of the water, the precipitation will be in the form of ________ ?

• A. Hailstorms
• B. Thunders
• C. Rain
• D. Lightning

Explanation: When air near the ground is above 0°C, frozen precipitation usually melts and reaches the surface as rain. Hail can still occur in special thunderstorms, but rain is the intended general answer.

757. Places where the temperature of air is below freezing point of the water, the precipitation will be in the form of __________ ?

• A. Snow
• B. Lightning
• C. Hailstorms
• D. Thunders

Explanation: Below the freezing point, water vapour or ice crystals can reach the ground as snow. Lightning and thunder are associated with storms, not forms of precipitation.

758. What is the third most common gas found in the air we breathe ________ ?

• A. Hydrogen
• B. Neon
• C. Carbondioxide
• D. Argon

Explanation: After nitrogen and oxygen, argon is the third most abundant gas in dry air, making up about 0.93%. Carbon dioxide is much less abundant and continues to vary with emissions and natural processes.

759. In context of environment, the term "dirty dozen" refers to _____?

• A. 12 most harmful greenhouse gases
• B. 12 ozone depleting substances
• C. 12 persistent organic pollutants
• D. None of the above

Explanation: The environmental “dirty dozen” refers to the twelve persistent organic pollutants originally targeted under the Stockholm Convention. These chemicals persist, accumulate in organisms and can travel long distances.

760. The distance of a place South or North of equator is called__________?

• A. Longitude
• B. Latitude
• C. Aptitude
• D. None of these

Explanation: Latitude measures angular distance north or south of the equator, from 0° at the equator to 90° at the poles. Longitude instead measures distance east or west of the prime meridian.