Jawapan

2016-10-04T19:14:38+08:00
Land vertebrate have to withstand gravitational force and support its weight.Hollow bones is stronger and lighter than compact bones.
the surface area of hollow bones is bigger than compact bones therefore hollow bones can support bigger body weight in land vertebrates.
sorry I don't know how to answer it in bm
thank you.it's really helpful its okay . i can understand what you said✌
2016-10-04T19:46:19+08:00
Kerana tulang berongga adalah lebih ringan dan lebih kuat