zoology task 2.docx - A1 A2 Cnidaria This phylum has a diverse set of reproductive systems The major commonality amongst all organisms in this phylum

zoology task 2.docx - A1 A2 Cnidaria This phylum has a...

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A1)
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A2) Cnidaria: This phylum has a diverse set of reproductive systems. The major commonality amongst all organisms in this phylum would be that gametes are expelled from the adult. The majority of cnidaria are hermaphroditic and partake in external fertilization, with the exception of cephalopods and arthropods. Jellyfish reproduction occurs in many stages. Adult jellyfish release sperm and eggs (gametes) into the water. This is an example of external fertilization. A planula forms, which attaches to a structure and grows into a polyp. From there, the polyp can carry out asexual reproduction and create clones of itself. The polyps then become the ephyra, which can then reproduce sexually and become adult jellyfish. Hexapods: This phylum is dioecious, meaning it has both male and female individuals. They reproduce by internal fertilization, which is where the male deposits sperm into the female. Fertilized eggs are then released by the female, where they can develop into the adult organism. Male house flies fertilize a female’s eggs. This is an example of internal fertilization. Adult female flies lay the fertilized eggs, which then develop into first instar larva. The larva eats and grows, going through two more larva stages, then entering the pupa stage. In the pupa stage,
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