로그인
JAMB - Biology (1982 - No. 40)
Flatworms and roundworms are said to be invertebrates because
they are small animals
they can live inside the vertebrates
some of them are unicellular
they have no backbones
they are parasitic
댓글 (0)
댓글을 달려면 로그인하세요
광고
자바스크립트가 이 페이지를 올바르게 로드하도록 허용
