4. The Malpighian tubules of insects     grind food into find particles before it goes to the hind-gut   have ostia around the outer edge   are functionally equivalent to the vertebrate kidney   secrete juvenile hormone   are found in the mesothorax

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Marine Evolution

Marine habitat is less explored, and hence, its biological diversity is far less known. The marine habitats are not constant due to their shifting nature, while the terrestrial habitats are more stable. Marine biology is the science that deals with the study of diverse marine species, their interactions, and behavioral characteristics.