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Q. Is fecundation in amphibians internal or external? In this aspect are amphibians evolutionarily proximal to fishes or to reptiles?
In the majority of the amphibian species fecundation is external. This feature is common to bony fishes too and the embryonic development of amphibians are a heritage from osteichthyes and it shows that the reproductive system.
Curiously although having external fecundation amphibian female and male copulate to stimulate the liberation of egg cells and sperm. This phenomenon does not characterize internal fecundation since the gametes unite in water.
parasitic adaptation of round worm
Define Observation or Inference for Mucic Acid Test? 1. White crystals of mucic acid will be seen. 2. The sugar solution contains galactose. 3. Lactose gives this test, s
An A=T mispairing leads to an A=C substitution. The other DNA helix will contain a(n) __ pair. a. A=C b. A=T c. G=C d. B=Q e. T=T Can you also explain it please so if I'm ask
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Invasion or Migration - Ecology When a habitat is changed it can be a potential site for the establishment of many organisms. Many species actually invade or reach this new si
detailnote on structure of stomach
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What is natural selection? Natural selection is the method by which organisms that have certain favorable traits are better capable to survive and make successfully than organi
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