Environmental Science MCQs

✅ The correct answer is option E.
Biodiversity loss leads to the extinction of species. Factors such as habitat loss and fragmentation, over-exploitation, alien species invasion and co-extinction are causes for such losses. When there are no more individuals of a species (plant or animal) alive anywhere in the world, the species is said to be extinct.

✅ The correct answer is option D.
A renewable source of energy is trees.

✅ The correct answer is option B.
The maximum in daytime surface temperature typically occurs after the earth receives its most intense solar radiation.

✅ The correct answer is option B.
An aurora is caused by the streams of electrified particles (which are emitted by the sun) trapped in the magnetic field of the earth. It is produced when this magnetosphere is disturbed by the solar wind carrying the charged particles. Auroras are seen in latitudes of around 70 degrees.

✅ The correct answer is option A.
The presence of high coliform counts in water indicate contamination by human wastes. Coliform bacteria or Escherichia coli is a bacteria that is present in human intestine. It is a useful bacteria. When people discharge fecal matter near water bodies these microorganisms enter water.

✅ The correct answer is option D.
Predators are the animals which kill or hunt other animals for food and the animal which is killed is called as prey. So, the lion is the predator which hunts for the wild beast for their food. Secondary consumers are carnivores or omnivores which feed on the primary consumer which are herbivores. Therefore, the lion is a secondary consumer and wild beast is the primary.

✅ The correct answer is option C.
The concept that ‘population tends to increase geometrically while food supply increases arithmetically were put forward by Thomas Malthus. In his theory of natural selection, Charles Darwin was greatly influenced by the English clergyman Thomas Malthus.

✅ The correct answer is option A.
Biofuel is derived recently from living organisms and their metabolic products.

✅ The correct answer is option C.
Tidal power station at the mouth of the river blocks the flow of polluted water into the sea.

✅ The correct answer is option B.
Major consumer of wood from forest is Paper Industry.