An organism which breaks down the food material outside the body and then absorbs it is
An organism which breaks down the food material outside the body and then absorbs it is
Options
d
Marking Scheme
- 11 mark for selecting the correct option (d).
Hint
Think of organisms like bread moulds, yeast, and mushrooms that grow on decaying organic matter and perform extracellular digestion.
Quick Oral Answer
Rhizopus is a fungus (bread mould) that performs saprophytic nutrition by releasing enzymes to break down food outside its body and then absorbing the simplified nutrients.
Analysis & Explanation
The correct option is (d). Organisms like fungi (such as bread moulds, yeast, and mushrooms) break down complex food materials outside their body into simpler substances and then absorb them. Rhizopus is a common bread mould (fungus) that exhibits this saprophytic mode of nutrition.
- Option (a) is incorrect because Cuscuta (amar-bel) is a parasitic plant that derives nutrition directly from a host plant without killing it, rather than breaking down food externally.
- Option (b) is incorrect because Tapeworm is an internal parasite that absorbs already digested food from the host's intestine.
- Option (c) is incorrect because Rhizobium is a symbiotic bacterium that fixes atmospheric nitrogen and does not perform extracellular saprophytic digestion.
Common Mistakes
- 1Students often confuse parasitic nutrition (like Cuscuta) with saprophytic nutrition (like Rhizopus). Parasites live on or inside a host, whereas saprophytes break down dead organic matter outside their bodies.
Interesting Facts
Rhizopus stolonifer, commonly known as black bread mould, releases digestive enzymes directly onto the bread surface to dissolve starch into simple sugars before absorbing them.
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Frequently Asked Questions
How many marks does this question carry in CBSE Class 10 Science 2023?
This question carries 1 mark in the CBSE Class 10 Science 2023 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Life Processes" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Heterotrophic Nutrition" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2023 paper?
This is a MCQ question from Section A in the CBSE Class 10 Science 2023 paper.