Organisms and Populations — Important Questions
Maharashtra Board · Class 12 · Biology
43 important questions from Organisms and Populations for Maharashtra Board Class 12 Biology, with answers. Written for the board exams 2027.
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Important Questions from Organisms and Populations
Which of the following are major abiotic factors affecting organisms?
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Temperature, Water availability, Light intensity, Soil composition
Temperature, water, light, and soil are the four major abiotic (non-living) factors that influence organisms. Predation and competition are biotic (living) factors.
Which type of population interaction benefits both species?
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Mutualism
In mutualism, both species benefit from the interaction (+ +). Competition harms both (- -), predation benefits predator but harms prey (+ -), and parasitism benefits parasite but harms host (+ -).
The carrying capacity of an environment is represented by the letter:
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K
K represents the carrying capacity - the maximum population size that an environment can sustain. N represents population size, r represents growth rate, and B represents births.
Desert plants like Opuntia have modified leaves as:
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Spines
In desert plants like Opuntia (prickly pear), leaves are modified into spines to reduce water loss through transpiration. The flattened stem takes over the photosynthetic function.
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