Population size in any given habitat is also known as _______

(1) Population cluster    

(2) Population explosion

(3) Population abundance   

(4) Population density

Subtopic:  Population Characters: Density |
 93%
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The population with the following age pyramid:

 

1. Will grow exponentially in near future

2. Will grow steadily in the future

3. Is likely to remain stable in future

4. Is likely to decline in future

Subtopic:  Population Attributes |
 70%
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Mycorrhizal hyphae helps in:
1. absorbing minerals and ions
2. maintaining cell shape
3. increasing cellular respiration
4. anchoring a plant

Subtopic:  Population Interactions: Commensalism, Protocooperation & Mutualism |
 84%
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Earliest vascular plants on land acquired water and mineral nutrients most likely by:
1. absorption by trichomes.
2. diffusion through stomata.
3. the help of symbiotic mycorrhizae.
4. osmosis through the root hairs.

Subtopic:  Population Interactions: Commensalism, Protocooperation & Mutualism |
 61%
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Epiphytes:
1. are aerial vines common in tropical regions
2. are parasitic and use haustoria
3. live in oligotrophic soil and digest insects to obtain nitrogen
4. grow on other plants but do not obtain nutrients from their hosts

Subtopic:  Population Interactions: Commensalism, Protocooperation & Mutualism |
 68%
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The endosymbiosis between early eukaryotes and the prokaryote lineage would be an example of:

1.Commensalism2.Mutualism
3.Parasitism4.Competition

Subtopic:  Population Interactions: Commensalism, Protocooperation & Mutualism |
 74%
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Select the incorrect statement

(1) Organisms living in oceans, lakes and rivers do not face any water related problems.

(2) Productivity and distribution of plants is dependent on water.

(3) The levels of thermal tolerance of different species determine to a large extent their geographical distribution

(4) Foraging, reproductive and migratory activities of some animals are dependent on seasonal variations in light

Subtopic:  Abiotic Factors: Light & Water (OLD NCERT) |
 89%
From NCERT
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Smaller animals tend to lose body heat very fast as compared to larger animals because they have

(1) Higher surface to volume ratio.

(2) Lower surface to volume ratio.

(3) Equal values of surface and volume.

(4) Very low BMR (basal metabolic rate).

Subtopic:  Adaptations (OLD NCERT) |
 87%
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Choose the odd one out with respect to structure formed in the different organisms during suspended phase.

(1) Bacteria                          -        Thick-walled spores

(2) Higher plants                  -        Seeds, vegetative propagules

(3) Zooplankton                    -        Diapause state

(4) Ectothermic organism      -        Torpid state during favourable season.

Subtopic:  Response of Organisms to Abiotic Factors (OLD NCERT) |
 78%
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The main reason behind building burrows in soil by burrowing animals is

(1) To escape from predators.

(2) To derive nutrition parts of plants from Underground.

(3) The mode of evolution chose burrows as a specific habitat.

(4) To hide and escape from the above ground heat.

Subtopic:  Adaptations (OLD NCERT) |
 84%
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