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In earthworms, when the ovaries mature, the clitellum secretes a viscous substance in the form of a girdle. This girdle hardens in to a cocoon around the clitellum. The ova are discharged into cocoon. When this cocoon moves over the spermathecae openings, the sperms which are already collected from another worm and stored in the spermathecae are discharged into the cocoon. The cocoon finally, comes out of the body and fertilization takes place in the cocoon. As it is taking place outside the body, it is called as "external fertilization".
Explain Understanding the response of farmers? Understanding the response of the farmers by the government also influences the food production. Government policy influences the
This process involves the regulation of the concentration of the body fluids through control of water content and salt content of the blood. If a person loses water from their bloo
Minerals :- Sulfur Food Source Widely distributed Nutritional Functional role Essential nutrient: A constituent of the essential amino acids methionine and
To develop the food exchange list, a doctor or dietician keeps in mind four important basic points. These are: 1) Group similar foods in one group. For example cereals, roots,
Q. How does the male gamete penetrate the egg cell? How does the female gamete protect itself from the entrance of more gametes after the entrance of the first sperm cell? The
Why is pH regulation important for living beings? How do mineral salts participate in this regulation? The potential of hydrogen (pH) is a measure of the amount of hydrogen ion
Suppose you were presented with two 40X lenses to use on your microscope, lens A had a numerical aperture of 0.56 and lens B had a numerical aperture of 0.75. Which is best and why
Explain the Hydrophobic Grid Membrane Filter (HGMF)? It is also used to enumerate microorganisms from a variety of food samples. By using this method, organisms as few as 10 ce
Explain the Metabolic Aberrations of Underweight? When energy intake falls below the minimal requirements, the body responds with an orderly physiologic adaptation involving th
Auxins Auxins are plant growth substances. The term Auxin usually refers to a chemical compound called Indole Acetic Acid (IAA), which is the major natural auxin. In plan
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