Sponges display nonspecific immunity. In an experiment, the cells of two different sponges were mixed and placed within a petri dish. The cells from each sponge sorted and arranged themselves together according to organism. What does this characteristic demonstrate? A. Sponges have memory T-cells and share a more recent common ancestor with vertebrates than other invertebrates. B. The experiment provides evidence for the speed of evolution and the use of specific immunity within the organism. C. Sponges have an ability to recognize their own cells as a characteristic of acquired immunity. D. Sharing genetic information from cell to cell is possible by means of receptors and protein-lined pits.

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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.