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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).
A genetic trait which is considered to be harmful in the present day might prove to be beneficial in future. For example by removing the trait for sickle cell we may increase the s
Management for Poisoning and Overdose: The following data should be obtained at the time of initial contact. Phone Number: getting the caller's telephone number is n
Updating by Deletion DELETE FROM ENROLMENT WHERE StudentId = SID ('S4'); As you can see, this differs from Example by the addition of the noise word FROM. The expression SI
What key idea, contained in Malthus's essay on populations, helped Darwin formulate his theory of natural selection?
Which two of the following changes (a - d) usually tend to occur in the plain dwellers when they move to high altitudes (3,500 m or more)? 1. Enhance in red blood cell size 2
Define measuring body composition- Total body potassium? It applies the' concept that body cells contain a constant amount of potassium and that its measurement is theref
What is Allantois One of the extraembryonic eggs found in the amniote animals. The allantois contains the metabolic wastes created by the developing embryo. May also be involved
why do we get severe leg pains when the internal bone is cracked?
mode of action of wbcs types
Mammalian Lungs - Respiration In this we will study mainly mammalian lungs as it is the best representative of a respiratory surface adapted for terrestrial respiration. For t
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