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Q. What is embryonic sac? Which are the cells that form the embryonic sac? What are their ploidies?
The embryonic sac is female gametophyte of angiosperms.
The embryonic sac is collected of three cells that remain next to the micropyle, two lateral synergids and the central oosphere (egg); one binucleated cell, the polar nuclei, is placed in the central region; three antipodal cells stay in the opposite side to the micropyle. Ever since all these cells come by mitosis from the functional megaspore they are haploid (n).
Cellular level - Level of body organization The next higher level of organization is the cellular level. This is really an aggregation of cells that are functionally different
Ventilation of Tracheal System - Diffusion Gaseous exchange due to diffusion generally takes care of the oxygen needs of most small insects. Similarly fairly large but inactiv
1. What are the examples of helobial endosperm
Describe normal regulation of blood glucose via the pancreatic hormones. How is this altered with Diabetes? Why is Diabetes called an impairment to the homeostasis of glucose? What
Q. Etiologic factor of Congestive Cardiac Failure? Congestive heart failure develops over a period of time when the necrotic tissues are not replaced by functional connective c
The major ecological imbalance on Earth is between the human species and the rest of Earth's biota. What are two specific actions we could do to achieve a balance (for example, rec
Explain the Human Milk Composition and Infant Growth and Development? This sub-section deals with composition of human milk, compares human milk with cow's milk and why human m
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Brefily describe diffusion ? Diffusion : Diffusion is the process in which there is a net movement of particles of a substance from an area of higher concentration to an are
Why Fats have highest heat energy density? Fats have highest heat energy density of 9 Kcal/g. It is the major storage form of energy in body requiring least space and minimum w
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