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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.
Digestion of Carbohydrates Digestion of food starts in the mouth itself by the action of enzyme salivary amylase and the carbohydrates present in the food, particular
Tonicity and the plant cells. Complete the experiment and answer the questions. Table 7.3: Potato type: Potato A: Beginning displacement (ml) = Ending displacem
Wet Stigma - Category of Stigma Petunia shows several randomly distributed 2-celled papillae on its surface. In a developing stigma, the epidermis is covered by a continuous,
Explain about the Vitamin A? Vitamin A, one of the fat soluble vitamins, refers to a sub-group of retinoid that possess the biological activity of all-trans-retinol. The term '
Run off Some of the rainfall is soaked into the soil and excess water flows over the land surface along the natural slope of the area. Run off is the main source of water for l
Define Paediatric Problems and Nutritional Management? The process of accepting and digesting food in adequate amounts to meet nutrition needs is termed as feeding. Certain gro
vulture undergo which type of nutrition
Q. What are the main bryophyte groups? The major bryophyte groups are the mosses, the hornworts and the liverworts.
WHAT ARE STAKEHOLDERS?
why should shivering contribute to heat gain in the body?
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