The evolution / development of the skeletal system of the vertebrate is an example of the process of cellular specialization.  This refers to the fact? a) all the ectoderm cells remain the same b) the cells derived from the endoderm to form osteocytes that secrete collagen c) the cells of the endoderm form chondrocytes that become notochord d) genes are activated or surpressed in the cells from the original mesoderm causing them to become chondrocytes and osteocytes the stem cells that sequentially produce the componets of the skeleton e) genes are not involved in this function?

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A:

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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.