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Fertilization - Development Biology
Previously you knew the process which leads to the differentiation of the male and female germ cells, the sperm and ova, respectively. In this section we shall describe the process by which the sperm and the egg unite to form a zygote. This process is known as fertilization. Fertilization results in
Activation would essentially mean that a sequence of metabolic and morphological changes are triggered that in turn cause the division of a unicellular zygote into a multicellular organism. Mostly we will describe the fertilization in mammals with occasional references to sea urchins. It is true that depending upon the habitat as well as the life styles there may be variations in the fertilization process in diverse organisms. But generally the events of fertilization are more or less similar in many different organisms. Prior to the actual fusion of the sperm and the egg nuclei, the germ cells prepare themselves for the fertilization process.
In interspecific sterility, the failure in mating occurs because of inability of the sperm to reach the egg in animals and the pollen to reach ovules in plants. In plailts interspe
Reproduction in coelentrata
Define Modes or Techniques for Chromatographic Separation In practice, chromatographic separation may take one of these modes or techniques: Paper chromatography (in w
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Q. What is the chemical equation of photosynthesis? The chemical equation of photosynthesis is given below: 6 CO 2 + 6 H 2 O + light --> C 6 H 12 O 6 + 6 O 2
Q. What is Forebrain? Forebrain: Found in the area of the forehead, this part of the brain is concerned with all the emotions, planning, organising, reasoning, memory, movement
Mylohyoid muscle Surgical manipulation at the crest of a severely resorbed ridge may injure the mylohyoid muscle. Manipulation of the tissues of the floor of the mouth for plac
Explain Tropical Rain Forests in biomes? You probably are well aware of the danger that the world's rain forests are facing in terms of extinction! There are huge numbers of sp
E n r o b e d Meat Products Enrobing/coating of meat products with edible materials enhances the acceptability and creation of variety to meat products. Whole egg liquid,
(1) It should have high "calorific value" or heat content. (2) It should have "moderate ignition temperature". (lgnition temperature is the minimum temperature at which it s
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