Verhulst-Pearl population growth is described by the equation
1. = rN
2. Nt = N0ert
3. Nt = N0+B+l-D-E
4. = rN
A set of characters for desert adaptation are
1. Respiratory roots, salt secreting glands, C4 cycle
2. Turions, thick cuticle on leaf surface, CAM pathway
3. Phylloclade, stomatal pits, CAM pathway
4. Phyllode, aerenchyma, high OP of cell sap
Choose the odd one out with respect to adaptations in organisms
1. Altitude sickness in humans is a physiological means to counteract the stressful condition
2. Biochemical adaptations are seen in organisms present at great depths in oceans
3. Allen's rule is seen in mammals of colder climate
4. Desert lizards lack the physiological and behavioural means to manage their body temperature
Choose the odd one out with respect to structure formed in the different organisms during suspended phase
1. Bacteria, fungi - Thick wall spores
2. Higher plants - Seed, vegetative propagules
3. Zooplanktons - Diapause stage
4. Ectothermic organisms - Torpid state during favourable season
Natural selection operates at the level of :-
1. Organism
2. Population
3. Community
4. Ecosystem
Regional and local variations within each biome lead to the formation of a wide variety of:-
1. Niche
2. Population
3. Microclimate
4. Habitat
Match the column A with column B :-
A B
a. phytophagous insects i) A stage of suspended development
b. Diapause ii) To avoid summer related problem
c. Homeostasis iii) feeding on plant sap
d. Aestivation iv) Maintenance of constant internal environment
1. a-(iv), b(ii), c-(iii), d-(i)
2. a-(iii), b(i), c-(iv), d-(ii)
3. a-(i), b(iii), c-(ii), d-(iv)
4. a-(iii), b(ii), c-(iv), d-(i)
Ecology explains us:-
1. | How organisms, while remaining as an individual interact with other organisms |
2. | How organisms, interact with physical habitats as a group |
3. | As a group how organisms behave like organised wholes that is population community, ecosystem or even as the whole biosphere |
4. | All of these |
ln the given figure, identify Coniferous forest, Arctic and Alpine Tundra and tropical forest, respectively:-
1. l, Vl and lll
2. V, Vl and lll
3. lV, lll and l
4. l, ll and lll
Formation of wide variety of habitats takes place by:-
1. Types of species inhabiting that area
2. Types of predation
3. Regional and local variation of environment conditions
4. All of the above