Earthworm lives in___________?
Correct answer: B. moist soil
- A. sea water
- B. moist soil
- C. fresh water
- D. none of these
Explanation
Earthworms require moist soil because their skin must remain damp for cutaneous respiration and they obtain food from soil containing organic matter. Fresh water may be selected because earthworms live in wet environments, but they are terrestrial rather than aquatic animals.
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Animal and plant cells share a plasma membrane, cytoplasm, nucleus, ribosomes, mitochondria and endoplasmic reticulum, but plant cells also have a cellulose cell wall, chloroplasts and a large permanent vacuole. Questions cover organelle structure and function, differences between the two cell types, and how membranes control movement of substances.
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