Urgent select the correct answer. a scientist, while performing an experiment on frog embryos at early gastrula stage, removed the dorsal lip part of one embryo and placed it in another embryo’s early gastrula opposite that embryo’s own dorsal lip. he observed that this recipient embryo developed another notochord and nerve chord where the extra dorsal lip had been attached instead of the organ into which it was supposed to develop. it almost gave rise to most of a secondary embryo (siamese twins) in the later developmental stage. what kind of cell mechanism is observed in this experiment? a. metamorphosis b. induction c. mitosis

C. Mitosis

Explanation:

Mitosis is the process of cell division that is responsible for multiplying cells during embryogenesis. Through mitosis the zygote (unicellular) is transformed into a multicellular organism. The cells generated by mitosis in the development of the embryo  eventually differentiate to form different specialized tissues. The extradorsal lip did not generate the organ the scientist expected because the dorsal lip cells were already differentiated and programmed to generate the notochord and nerve chord of  the embryo.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.