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MODEL PAPER 2025 — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYMODEL PAPER 20255 Marks
Question
B.
(i) Name the two types of desirable approaches to conserve biodiversity? Explain with examples bringing out the difference between the two types.
(ii) State the features of a stable biological community?
✓

Answer

B.(i)
S. No.In situ conservationEx situ conservation
(i)It is conservation and protection of biodiversity in its natural habitat.It is conservation of selected threatened plant and animal species in places outside their natural habitat.
(i)Population is conserved in the surroundings where they have developed their distinctive features.Population is conserved under simulated conditions that closely resemble their natural habitats.
(iii)eg, national parks, biosphere reserves, wildlife sanctuaries, etc.eg, botanical gardens, zoological parks, wildlife safari, gene banks, etc.

(ii) A stable community should not show too much variation in productivity from year to year; it must be either resistant or resilient to occasional disturbances (natural or man-made), and it must also be resistant to invasions by alien species.

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