Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
52тАЛ)3xтИТ6x2+x3тАЛ6x+40
Only a
Only c
Only b and c
Only a and b
Only c
Statement a is correct because autotrophs (like green plants and some bacteria) use simple inorganic substances like carbon dioxide and water to synthesize food. Statement b is correct because heterotrophs rely on complex organic substances that must be broken down into simpler forms using biocatalysts (enzymes) for bodily upkeep and growth. Statement c is INCORRECT because plants are autotrophic organisms, not heterotrophic.
Statement a is correct because autotrophs (like green plants and some bacteria) use simple inorganic substances like carbon dioxide and water to synthesize food. Statement b is correct because heterotrophs rely on complex organic substances that must be broken down into simpler forms using biocatalysts (enzymes) for bodily upkeep and growth. Statement c is INCORRECT because plants are autotrophic organisms, not heterotrophic.
Autotrophs are like a manufacturing factory that builds its own products from raw base materials (air and water), while heterotrophs are like consumers who buy ready-made pre-packaged meals and break them down into digestible ingredients in the kitchen.
AUTO = Self (makes own food), HETERO = Other (depends on others).
6CO2тАЛ+6H2тАЛтЧпSunlightChlorophyllтАЛC6тАЛH12тАЛO6тАЛ+6O2тАЛ тАФ Photosynthesis reaction in autotrophs
Nutritional modes in living organisms are broadly classified into autotrophic and heterotrophic modes. Autotrophic organisms possess photosynthetic pigments (like chlorophyll) that fix inorganic carbon dioxide and water into glucose via photosynthesis. Heterotrophic organisms lack this mechanism and depend directly or indirectly on autotrophs for organic nutrition, digesting complex polymers into absorbable micromolecules.
Autotrophs convert light energy into chemical energy using inorganic molecules like CO2тАЛ and H2тАЛтЧп.
Heterotrophs depend on ready-made organic food synthesized by autotrophs.
Plants are classified as autotrophs because they perform photosynthesis, unlike animals and fungi which are heterotrophs.
Complex food in heterotrophs is broken down into simpler molecules using biological catalysts called enzymes.
Autotrophy allows independence from external organic food sources.
Heterotrophy allows utilization of diverse and energy-dense organic matter from various environmental niches.
Autotrophic organisms are strictly dependent on external physical factors like sunlight and water availability.
Heterotrophs must spend energy searching for and digesting complex food.
Understanding primary production in ecology and global carbon cycles.
Studying metabolic pathways and digestive enzyme functions in human and animal physiology.
Statement 'a' is a direct description of autotrophic nutrition.
Statement 'b' describes the core process of heterotrophic nutrition involving digestion.
Statement 'c' is incorrect because green plants are autotrophs (primary producers), not heterotrophs.
B is correct тАФ Only statement c is incorrect because plants are autotrophic organisms, not heterotrophic.
Always double-check biological classifications such as whether organisms are producers (autotrophs) or consumers (heterotrophs) when analyzing nutritional statements in exam questions.
Get instant step-by-step AI explanations, full shift Previous Year Papers (SSC GD, RRB, SSC JE), and regional rank analysis on the official Examoogle App.
Free Download тАв 100K+ Aspirants