Compare and contrast dolphins and porpoises. How are they similar? How are they different?

1. Compare and contrast dolphins and porpoises. How are they similar? How are they different?

2. What characteristics of an egg cell and a sperm cell are critical to their ultimate function of combining to form a zygote?

3. How do the members of the family Kogiidae (pygmy or dwarf sperm whales) protect themselves

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