123. The most important reason for decrease in biodiversity is

A. Habitat pollution
B. Introduction of exotic species
C. Over-exploitation
D. Habitat destruction
✅ The correct answer is option D.
The main cause of the loss of biodiversity can be attributed to the influence of human beings on the world’s ecosystem, In fact human beings have deeply altered the environment, and have modified the territory, exploiting the species directly, for example by fishing and hunting, changing the biogeochemical cycles and transferring species from one area to another of the planet.

124. In which of the following the maximum plant diversity is found

A. Tropical evergreen forests
B. Tropical moist deciduous forests
C. Sub tropical mountain forests
D. Temperate moist forests
✅ The correct answer is option A.
Species diversity is greatest in the tropics, particularly in tropical forests and coral reefs. The Amazon basin in South America has the largest area of tropical forests.

125. Which of the following statement is incorrect regarding ecological pyramids

A. The pyramid of energy is inverted in ocean ecosystem
B. The pyramid of biomass is inverted in aquatic ecosystem
C. The pyramid of numbers is upright in grass land ecosystem
D. The pyramid of biomass is upright in grass land ecosystem
✅ The correct answer is option A.
The pyramid of energy is inverted in ocean ecosystem this statement is incorrect regarding ecological pyramids.

129. If we uncover half of the forest, covering of the earth, what crisis will be produced at most and at first?

A. Some species will be extincted
B. Population and ecological imbalance will rise up
C. Energy crisis will occur
D. Rest half forests will maintain this imbalance
✅ The correct answer is option A.
Some species will be extincted.

130. What is the animal symbol of W. W. F (World Wildlife Fund) ?

A. Red Panda
B. Giant Panda
C. Tiger
D. Kangaroo
✅ The correct answer is option B.
Adored around the world, the distinctive black and white animal is a national treasure in China and has been the symbol of WWF since its formation in 1961. While its numbers are slowly increasing, the giant panda remains one of the rarest and most endangered bears in the world.