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Emboly Movement - Involution
It denotes turning in or rolling over. Involution of mesodermal blastomeres has been observed in Amphioxus, reptiles, monotremes, amphibians, buds, and even in some eutherian mammals. Throughout gastrulation in the amphibians the blastomeres situated on the margin of the lip of blastopore roll over the lip (involute) to turns into internal. In the bird embryo the cells situated on the posterior margin of the blastoderm roll over (involute) to from the lower layer termed as the hypoblast and the presumptive mesodermal and endodermal cells situated on the surface of the blastoderm reach the interior by turning in by the groove of the primitive streak.
An enzyme isolated from a mutant bacterium grown at 20 degrees celsius works in a test tube at 20 degrees celsius but not at 37 degrees celsius( 37 degrees celsius is the temperatu
Minerals and Rocks A mineral is an inorganic body, formed by the process of nature, usually having a definite composition. If formed under favourable conditions, it has a
what Photoperiodism
The Father of Botany (370-285 B.C.); of all the men who ever lived upon the earth certainly one of the most remarkable was Theophrastus of Eresus who was born about 370 B.C. on the
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Molecular Biology Transgenesis: pro-nuclear injection of isolated gene into fertilised egg cell, cell divides to form embryo, then embryo implanted into surrogate.
Explain Procambium in primary growth in shoot ? The vascular tissue in the shoot is produced from a primary tissue called the procambium, located in the apical meristem. New vas
How is it structurally explained that the motor activity of the left side of the body is controlled by the right cerebral hemisphere and the motor activity of the right side of the
Q. How does biological diversity relate to the characteristics of the abiotic factors of an ecosystem? The ease of use of abiotic factors like light, mineral salts, moisture, h
Counselling involves a process, the aim of which is to help others to help themselves by making better choices and becoming better choosers of options. The counsellor's repertoire
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