PPSC test preparation Biology MCQs part 1
PPSC test preparation Biology MCQs part 1 Source: 8 class science book Choose the correct option. (i) The phenomenon that does not lead to global warming: greenhouse effect deforestation ozone depletion photosynthesis (ii). The feeding level of an organism in an ecosystem is called tropic level food chain secession level food Web (iii). The graphical representation of trophic relationship of organisms in an ecosystem is called tropic level food chain ecological pyramid predation (iv). All food chains are joined together to form tropic level food web ecological pyramid none of these (v). The energy of the sun is trapped as chemical energy by producers secondary consumers primary consumers tertiary consumers (vi). Consumers that actively hunt other organisms are called prey symbiont predator competitor (vii). A relationship where two species live together closely is called predation competition symbiosis none of these (viii) We can solve environmental problems by: reducing po