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Oogenesis
Oogenesis is the formation of ovum from oogonial cells that are formed in the ovary from primordial germ cells. And as in spermatogenesis it involves meiosis to produce haploid ovum. You have learnt in the section on spermatogenesis that the differentiation of sperm occurs after the meiotic events. In oogenesis the process of first meiotic division is very prolonged; and it is during this process that growth and differentiation of oocyte take place. In many animals most events related to oocyte differentiation occur during prophase I of first meiotic division. In animals which produce yolk-laden eggs, this phase is divided into
What action is EPA taking on plant-incorporated protectants? EPA has issued three final rules clarifying and formalizing EPA's framework for federal oversight of plant-incorpor
Characteristic Features of Avian Gastrulation Creation of hypoblast and its important role in formation of the axis and orientation of embryo. Existence of the cells
a) Lipoproteins are large molecular compounds that are essential to the transport of cholesterol and triglycerides (TGs) within the blood. They contain a lipid core composed of TG
Alterations occurring in fruits and vegetables You may already be aware that fruits and vegetables vary greatly in their chemical composition. Though, some generalizations are
How do arthropods grow? Because of the presence of exoskeleton the growth of an arthropod is periodical. During the growth period the animal loses the exoskeleton, grows and de
Q. What is polyembryony? Polyembryony is the phenomenon in which a single embryo in its initial embryonic stage divides itself forming many new individuals of genetically ident
Double Vessel Disease (DVD) : Percutaneous intervention with stetting is usually advised for these patients. However if it is left main equivalent disease or when block is close
WHAT is zoonosis?
DESCRIBE ELECTRON TRANSPORT SYSTEM AND PHOTORESPIRATION
How are the excretory systems of the three main arthropod classes constituted? In crustaceans a pair of excretory organs known as green glands exists. The green glands collect
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