Biology · ANIMAL KINGDOM

A marine biologist compares reproduction and anatomical features in male Chondrichthyes and Osteichthyes. Which statement accurately highlights a key reproduction-related difference?

1. Male Chondrichthyes possess pelvic claspers and undergo internal fertilization; Osteichthyes usually lack claspers and undergo external fertilization
2. Male Osteichthyes possess pelvic claspers for internal fertilization, whereas Chondrichthyes undergo external fertilization in open ocean
3. Both Chondrichthyes and Osteichthyes possess pelvic claspers and undergo viviparous direct development
4. Chondrichthyes are exclusively oviparous with external fertilization; Osteichthyes are viviparous with internal fertilization