Why are sawfish unique in their ability to perform parthenogenesis? ?

They are unique in the sense that sawfish are able to reproduce in the wild without the need of a partner. They were able to engage in asexual reproduction. In parthenogenesis, an egg cell is created by dividing a singular precursor cell into four separate ones. The cell that develops into an egg cell retains the cytoplasm and other vital cellular structures. The remaining three contain excess genetic material. Fertilization happens when one of the three extra cells essentially turns into a sperm cell and combines with the egg cell.

Parthenogenesis occurs in some vertebrates, but their offspring are usually stillborn. Sawfish are unique because they’re the first vertebrate species known to produce live offspring through this process.

Explanation:

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a physical change is being made.