Thursday, 2 March 2017

embryology - Why is cartilage replaced by bones in a vertebrate adult?


Why is cartilage present in a vertebrate embryo replaced by bones in an vertebrate adult even though cartilage can also provide me the structural framework like as in Chondrichthyes and they seem to do well with it as Sharks are members of Chondrichthyes which are some of the most fearsome creatures of the world.




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evolution - Are there any multicellular forms of life which exist without consuming other forms of life in some manner?

The title is the question. If additional specificity is needed I will add clarification here. Are there any multicellular forms of life whic...