Which of the following may occupy more than one trophic level in the same ecosystem at the same time?
[C] Snake [D] Frog
Which of these are true about sparrows?
[A] When it eats seeds and peas it is a primary consumer.
[B] When it eats insets and worms it is a secondary consumer.
[C] It may occupy more than one trophic level in same ecosystem at the same time. [D] All of the above
Which of the following organisms have no space in ecological pyramid although they play vital role in the ecosystem?
[C] Bacteria and fungi [D] Frog
Orderly and sequential changes in communities, parallel with the changes in the physical environment is known as:
[A] Ecological succession
[C] Divergent evolution [D] Convergent evolution
The entire sequence of communities that successively change in a given area are called:
[C] Succession [D] Sere
In the successive seral stages:
[A] There is change in diversity of species of organisms.
[B] Increase in number of species occurs.
[C] Increase in biomass occurs. [D] All of the above
If succession occurs on bare rock, it is known as:
[A] Primary succession
[B] Secondary succession
[C] Tertiary succession [D] Quaternary succession
Primary succession occurs on/in:
[A] Bare rocks
[B] Newly cooled lava
[C] Newly created pond [D] All of the above
Secondary succession occurs in:
[A] Flooded land
[B] Burned forest
[C] Abandoned farm land [D] All of the above
How is primary succession different from secondary succession?
[A] There is change in type of animals and plants during primary succession only.
[B] Anthropogenic disturbance can change seral stages in primary succession only.
[C] Primary succession occurs at slower rate. [D] All of the above
What happened during succession?
[A] Extinction of some species
[B] Increase in number of some species
[C] Change in type of decomposer species [D] All of the above
In secondary succession the species that invades an area depend on:
[A] Soil condition
[B] Water availability
[C] Seed or propagules present [D] All of the above
In which succession is climax reached faster?
[A] Succession on bare rock
[B] Succession on burned forest
[C] Succession on newly cooled lava [D] All of the above
Which is correct order of seral stages in hydrarch?
[A] Phytoplankton-submerged plant-submersed free floating plant stage-reed swamp stage-marsh-meadow stage-scrub stages—forest
[B] Scrub stages—forest-reed swamp stage-marsh-meadow stage-submersed free floating plant stage-submerged plant-phytoplankton
[C] Submerged plant-marsh-meadow stage-scrub stages-forest-phytoplankton-submersed free floating plant stage-reed swamp stage [D] Phytoplankton-reed swamp stage-scrub stages-forest-submerged plant-submersed free floating plant stage-marsh-meadow stage
Which is a pioneer species in primary succession on rocks?
[C] Bryophyte [D] Pteridophyte