Osteichthyes have a two-chambered heart, are cold-blooded, exhibit separate sexes with typically external fertilization, are mostly oviparous, and undergo direct development.
Osteichthyes have a two-chambered heart, are cold-blooded, have separate sexes, usually external fertilization, are mostly oviparous, and have direct development.
| Text | Heart is two chambered in Osteichthyes (one auricle and one ventricle). They are cold-blooded animals. Sexes are separate. Fertilisation is usually external. They are mostly oviparous and development is direct. |
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