1. Population size
2. Natality
3. Vital index
4. Population growth curve.
Vital index
1. Limnetic zone
2. Profoundal zone
3. Littoral zone
4. Benthic zone.
Limnetic zone
1. Vital index
2. Growth rate
3. Survival rate
4. Biotic potential.
Vital index
1. Fish cultivation
2. Soil fertility
3. Mud formation
4. Soil and moisture conservation.
Soil and moisture conservation.
1. Green plants
2. Bacteria
3. Phytoplankton
4. Zooplankton.
Phytoplankton
1. Symbiosis
2. Parasitism
3. Saprophytism
4. None of these.
Symbiosis
1. Mutualism
2. Protocooperation
3. Parasitism
4. Predation.
Mutualism
1. Yeast – production of biogas
2. Rhizobium – parasite in the roots of leguminous plant
3. Mycorrhizae – mineral uptake from soil
4. Myxomycetes – the disease ring worm.
Mycorrhizae – mineral uptake from soil
1. A species which makes up only a small proportion of total biomass of a community yet has a huge impact on the community’s organization and survival
2. A common species that has plenty of biomass, yet has a fairly low impact on the community’s organization
3. A rare species that has minimal impact on the biomass and on other species in the community
4. A large dominant species that constitutes a large portion of the biomass and which affects many other species.
A species which makes up only a small proportion of total biomass of a community yet has a huge impact on the community’s organization and survival
1. Benthic brown algae, coastal red algae and daphnids
2. Benthic diatoms and marine varuses
3. Free floating microalgae , cyanobacteria and Nano plankton
4. Sea grasses and slime moulds.
Free floating microalgae , cyanobacteria and Nano plankton