Shell of egg is leathery in appearance in___________?
Correct answer: B. Reptiles
- A. Amphibians
- B. Reptiles
- C. Birds
- D. Prototherians
Explanation
Reptile eggs usually have a tough, flexible, leathery shell that reduces water loss while allowing some exchange of gases. Students may choose c because bird eggs also have shells, but bird shells are typically hard and heavily calcified rather than leathery.
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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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