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Based on how yolk is distributed, eggs can be categorized as follows: (i) Homolecithal: Yolk is uniformly spread. (ii) Telolecithal: Yolk is concentrated near the vegetal pole, while cytoplasm and nucleus are located near the animal pole. (iii) Centrolecithal: Yolk is positioned at the center and surrounded by cytoplasm.

1. Homolecithal: Yolk is uniformly spread
2. Telolecithal: Yolk is concentrated near the vegetal pole, while cytoplasm and nucleus are located near the animal pole
3. Centrolecithal: Yolk is positioned at the center and surrounded by cytoplasm
4. All of the above

Correct answer: All of the above

Solution

The question describes the three types of eggs based on yolk distribution, and all the given options correctly match their definitions. Therefore, the correct answer is 'All of the above.'

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