A. Like a food chain
B. A set of interconnected food chains, illustrating the tropic relationships among species
C. The set of prey species that are consumed by animals in an ecosystem
D. The tropic (feeding) levels that can be observed in an ecosystem
A. Higher than last night’s minimum temperature
B. Lower than last night’s minimum temperature
C. The same as last night’s minimum temperature
D. Above freezing
A. Quantity of biomass in a trophic level at a particular period is called as standing crop
B. The energy content in a trophic level is determined is determined by considering a few individuals of a species in that trophic level.
C. The succession that occurs in newly cooled lava is called primary succession
D. Rate of succession is faster in secondary succession
E. Phytoplanktons are the pioneers in the aquatic ecosystem
A. Higher than at present
B. Lower than at present
C. The same as it is now
D. Much more variable than it is now
A. The maximum theoretical amount
B. None
C. The same as it would at any other temperature
D. Depends on the chemical composition of the object
A. The resource it utilizes
B. Functional role in the ecological system
C. The range of conditions that it can tolerate
D. All of these
A. The community of organisms together with the environment in which they live
B. The abiotic component of a habitat
C. The part of the earth and its atmosphere which inhibits living organisms
D. A community of organisms interacting with one another
A. In most ecosystems, the pyramid of numbers and biomass are up right
B. In tree dominated ecosystem the pyramid of numbers is inverted
C. The pyramid of energy expresses mainly the rate of food production
D. In deep water ecosystem, the pyramid of biomass is upright
E. The total energy flow at successive tropical level always decreases
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
A. The length of human hair changes as the relative humidity changes.
B. During the winter, low relative humidity can irritate the mucus membranes in the nose and throat.
C. The relative humidity is a measure of the air’s actual water vapor content.
D. A change in the air temperature can change the relative humidity.
