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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.
Name the two hormones produced by the pancreas and say (a) in what circumstances, (b) in what way, they adjust the glucose concentration in the blood.
Explain the Shear or Moment Diagrams Shear diagram changes by magnitude of the load. Shear is constant along unloaded portions of a beam For a point load, the she
Q. Operatory Preparation in sterilization process? 1. The circulator (non-sterile assistant) should begin to prepare the operatory while the sterile assistant scrubs. If there
What is the significance of proteins for living beings? Proteins play a fundamental role in nearly all biological processes. Because of their diversity they can assume many dif
GROWTH AT DIFFERENT LEVELS - 1. Molecular level - It involves synthesis of new molecules and their aggregation into organellae. 2. Cellular level - It includes
Define the Elimination of Vitamin E? The primary oxidation product of α-tocopherol is α-tocophery quinone that can be conjugated to yield the glucuronate. This glucnronide is e
Minerals :- Zinc Food Source Meats, cereals. Nutritional Functional role Essential nutrient: Deficiency produces loss of appetite, growth retardation, skin
What do you mean by branchial basket? In ascidian adults the pharynx is enlarged to form branchial basket. Pharyngeal openings in wall of the basket allow water to pass through
It is a neural mechanism that plays a role in encoding of new information. Encoding takes place as a result of changes in the strength of synapses among neurons in neuronal network
Concomitant or Non-Paralytic Squnit This type of squint usually occurs when there is an obstacle in the sensory pathway of binocular reflex such as refractive errors, opacities
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