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Fish and many other marine animals reproduce by eggs. The eggs are formed in the ovaries, (cf. Fig. 2.1), and in addition to the germ of a new individual, an egg contains the necessary nutrients in the form of yolk and white for the development of the fetus. The yolk is in principle a single cell, where the germ is the cell nucleus, which contains the genetic material.

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Eggs and Roe

  • 章节

  • 发表日期：

    2026年

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  • Ole G. Mouritsen,
  • Klavs Styrbæk

摘要

Fish and many other marine animals reproduce by eggs. The eggs are formed in the ovaries, (cf. Fig. 2.1), and in addition to the germ of a new individual, an egg contains the necessary nutrients in the form of yolk and white for the development of the fetus. The yolk is in principle a single cell, where the germ is the cell nucleus, which contains the genetic material.