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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".
Q. Microorganisms on basis of oxygen requirement for growth? On basis of oxygen requirement for growth: - Obligate Aerobes: Require oxygen for growth and multiplication e.g
Where is the defect in the Argyll Robertson pupil The defect in Argyll Robertson pupil is due to light near dissociation because pupil react better to near than light.
Q. Explain the process of Angioplasty? Inflation of stenotic segment causes stretching of the vessel, fracture of the intimal plaque, partial disruption of the media and adven
Cellular Totipotency The innumerable cells which constitute the body of a higher plant or animal and containing identical genetic material can be traced to a single cell-the
Explain which is better to grow plants in Rock sand or soil? Ans) When we grew plants inside, with no wind, and the plants in the rocks grew superior to the plants that were gr
BLOOD COAGULATION - DEFINITIO N - The property of blood to change from fluid to gel state within a few minutes of its coming in contact with air is called blood coag
Q What are the major cells of which poriferans are made? Sponges have their external wall covered by flat cells called pinacocytes and having pores well-delimited by special ce
Changes in Animal Life during Xerosere Just like the hydrosere, there occur successive changes in animal life during the xerosere. A few mites are usually found associated wi
wdomestic effluent hat is
Define the Features of Cladosporium? Identifying Features of Cladosporium: 1. Colonies are small, heaped, powdery and greenish black in colour. 2. Mycelium is septate and
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