Free Environment and Atmosphere MCQs with Answers

151. Hen and chicken disorder is associated with__________ ?

• A. Mango
• B. Grapes
• C. Tomato
• D. Guava

Explanation: Hen-and-chicken disorder is a physiological disorder of grapes in which berries develop unevenly, with some remaining small and seedless. It is therefore associated with grape cultivation rather than mango, tomato, or guava.

152. Which of the following is the flightless bird?

• A. Pavo cristatus
• B. kakapo
• C. Passer
• D. None of these

Explanation: The kakapo is a flightless nocturnal parrot native to New Zealand. Pavo cristatus, the peacock, and Passer, the sparrow genus, are flying birds.

153. The principal constituent of the atmosphere of the Earth is?

• A. Oxygen
• B. Carbon
• C. Hydrogen
• D. Nitrogen

Explanation: Nitrogen makes up about 78% of Earth’s atmosphere, making it the principal constituent. Oxygen is second at about 21%, while carbon and hydrogen occur mainly in compounds and trace gases.

154. Which layer of the atmosphere lies close to the earth?

• A. Stratosphere
• B. Mesosphere
• C. Troposphere
• D. Thermosphere

Explanation: The troposphere is the lowest atmospheric layer and lies directly next to Earth's surface. Most clouds, weather and atmospheric water vapour are found in this layer.

155. Identify the blackest fish in the oceans?

• A. Black Seafish
• B. Black Dragon fish
• C. Black Sea Horse
• D. Black Gillfish

Explanation: The black dragonfish is noted for its extremely dark, light-absorbing body, an adaptation that helps it remain concealed in the deep ocean. The other names are not recognised standard examples of the blackest fish.

156. 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.

157. 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.

158. 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.

159. 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.

160. 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.