Science Group
Explore subjects and practice MCQs
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1,000
Total MCQs
Unit-2 Biodiversity
Answer: Chloroplasts contain chlorophyll, where photosynthesis takes place.
Answer: Animals are heterotrophs that cannot photosynthesize and lack cell walls.
Answer: Saprophytes feed on dead and decaying organic matter.
Answer: Scientists have described about 1.7 to 2 million species so far.
Answer: Insects form the largest group with the most described species.
Answer: Autotrophs prepare their own food, e.g., green plants through photosynthesis.
Answer: Taxonomic ranks are nested, so members of a class also share the same phylum and kingdom.
Answer: The scientific name of the tiger is Panthera tigris.
Answer: In Panthera tigris, 'tigris' is the specific epithet that identifies the species.
Answer: When written by hand, scientific names are underlined; in print they are italicized.
Answer: Archaebacteria and Eubacteria are the two prokaryotic kingdoms.
Answer: Eukaryotic cells possess a true, membrane-bound nucleus.
Answer: Mushrooms are saprophytic fungi that decompose dead organic matter.
Answer: Decomposers break down dead matter and recycle nutrients into the soil.
Answer: Genetic diversity provides the variation needed for species to adapt to environmental changes.
Answer: Species richness is the total number of different species in an area.
Answer: Endemic species are found only in one particular geographic region.
Answer: Deforestation destroys habitats and is a major threat to biodiversity.
Answer: Habitat loss directly causes population decline and extinction of species.
Answer: Invasive species outcompete native species and disturb the balance of ecosystems.