Free Online Mock Biology Multiple Choice Test on Organism and Environment |
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| Sub Category : Organism and Environment |
Test : 5 |
Time Left :
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| 1.'Allomones, Kariomones and Depressants' are |
(1) Alarm substances (2) Pheromones (3) Trail substances (4) Allelochmicals.
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1 2 3 4 |
| 2.Diatoms and protozoans may exceed....per litre of sea water |
(1) 1,000 (2) 10,000 (3) 1,00,000 (4) 1,000,000.
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1 2 3 4 |
| 3.Number of earthworm in an acre of garden soil is |
(1) 45,000 (2) 53,000 (3) 63,000 (4) 73,000.
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1 2 3 4 |
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4.An estimate of the number of individual in a total area or volume is termed as? |
| (1) Crude density (2) Ecological density (3) Theoretical (4) Natality.
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1 2 3 4 |
| 5.Increase in population becomes rapid and occurs at its full potential rate is called? |
(1) Lag phase (2) Positive acceleration phase (3) Exponential phase (4) Negative acceleration phase.
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1 2 3 4 |
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