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Composite Endosperm - Variants of Endosperm
In the family Loranthaceae, the development of endosperm is unique. The ovary lacks ovules. The sporogenous tissue located at the base of ovary develops several embryo sacs which elongate considerably, some of them even entering the style. After fertilization, the primary endosperm nucleus of each embryo sac moves to the basal part where it divides to form cellular endosperm. During further development, the endosperms of all the embryo sacs in an ovary enlarge and become fused to produce a composite endosperm mass. Several proembryos belonging to individual embryo sacs with long suspensors develop but only one survives and attains maturity.
Of the following, which mechanisms are significant in the death of erythrocytes (pron: eh-rith-reh-sites) in human blood? Is it a) Phagocytosis (pron: fag-eh-seh-toe-sis) b)
Q. What is the function of mineral salts in the creation of electric tension (voltage) at the cellular level? The electric activity of the cell, for example, in neurons, depend
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You are asked to set up an experiment to investigate the effect of temperature on the rate of germination. You place ten soaked peas in every of three flower pots containing moist
Rainfall is high, sometimes higher than tropical rain forests but seasonal. There are pronounced wet and dry periods, and so are winter and summer seasons. The soils are brown in c
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Great importance is being given to life style modifications because of definite benefits observed in patients who follow this. Life style changes have advantages not only in the co
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