Question

What type of reproduction do organisms in the following phylums show:
1) Nematoda
2) Arthropoda
3) Mollusca
​4) Echinodermata
5) Chordata

Answer 1

Dear student,

1) Nematoda- The members of this phylum reproduce sexually and gonochoristic.
2) Arthropoda - They sexually reproduce externally by transferring sperm from the male to a female by way of sealed packets called spermatophores.
3) Mollusca - Mollusks reproduce sexually aquatic mollusks lay eggs that hatch into small, free-swimming larvae called veliger.
​4) Echinodermata - In Echinoderms reproduction is usually sexual, involving fertilization of eggs by spermatozoa
5) Chordata - Reproduction among members of this phylum is sexual (i.e., an egg is fertilized by a sperm). However, there are a few animals in this group reproduce asexually.

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