Embryonic induction is caused by part developing from_____________?
Correct answer: C. Mesoderm
- A. Endoderm
- B. Ectoderm
- C. Mesoderm
- D. Extraembryonic layers
Explanation
Embryonic induction occurs when one group of embryonic cells influences the development of neighbouring cells; the mesoderm acts as an important inducing tissue in early development. Thus, many such developmental signals arise from mesoderm-derived parts. A student may choose ectoderm because it forms structures such as the nervous system, but the question is asking about the inducing tissue, not the tissue being induced.
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The human reproductive system includes the male and female organs that produce gametes, secrete sex hormones and support fertilization and development. Questions cover the testes, ovaries, reproductive ducts, menstrual and ovarian cycles, ovulation, fertilization, implantation, placenta formation and the roles of FSH, LH, oestrogen, progesterone and testosterone.
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