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Which of the following is the reason for considering phylum Ctenophora as a minor phylum?
Option: 1
It has small sized animals
Option: 2
The animals of this phylum are economically unimportant
Option: 3
It is supposed to be a part of the phylum Cnidaria
Option: 4
There are only a few genera in this phyla
Answers (1)
Reproduction and Development in Ctenophora -
- Ctenophores reproduce only through sexual means. Fertilization is external and the development occurs through larval stage, hence it is indirect.
Statocyst:
- Statocyst is the main component of the sensory organ present at the opposite end of the mouth. It senses balance.
-
Ctenophora is a small phylum with 90 known species.
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