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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.
Give an example of how two organisms are interdependent.
If we make a cross of two phenotypically WT zebrafish, and we get the following results, what can we say about the genotype of those two WT looking parents from the following resul
The major air pollutants are: (i) Carbon monoxide, CO (ii) Nitrogen oxides, (NO)x (iii) Sulphur oxide, (SO)x (iv) Ground level ozone (O3) (v) Hydrocarbons (
Q. Explain Lane Eynon Method procedure? You will be carrying out the procedure in two steps using Lane Eynon Method. Step 1 It involves the standardization of copper s
Classification of Freshwater Ecosystems Fresh water ecosystems depend on the terrestrial ecosystems for large quantities of organic and inorganic matter which are constantly a
Infective Endocarditis It is an infection of the endocardial surface with micro organisms present in the lesion. The endocardium is contagions with the valves of the heart.
Glycolysis Oxidation of glucose is called as glycolysis.Glucose is oxidized to either lactate or pyruvate. Under aerobic conditions and the dominant product within most tissues
Trypsin Trypsin is secreted in the inactive form trypsinor - which is converted into the active form trypsin by the enzyme enterokinase secrated by the duodenal mucosa.
Q. What happens to the TSH (thyroid-stimulating hormone) blood level in hypothyroidism? Why is there enlargement of the thyroid in the endemic goiter disease? When there is low
advantages and disadvantages of protozoa
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