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Head - Structure of the Sperm
It exhibits a diversity of shapes in different animal groups, e.g., spherical (teleost fishes), rod or lance shaped (amphibians), spirally twisted like a corkscrew (birds), spoon shaped (man), flattened (buffalo) or hooked (mouse and rat) or occasionally round (bivalve molluscs). Some of these shapes may be interpreted as an adaptation to propulsion in fluid media. The genetic functions are embodied in the nucleus; activation of egg during fertilization is basically initiated by anterior cap like acrosome. The nucleus occupies the greater part of head and it also determines the shape of head. During the course of sperm differentiation (spermiogenesis), everything in the nucleus not directly concerned with the transmission of heredity characters is discarded leaving only the actual material of genes (DNA) which is tightly packed within the nucleus.
Erythrocytic cycle The cycle that takes place in the body of man who is considered as secondary host is called the erythrocytic cycle. The first stage of the cycle begins
Define about Aliphatic alcohols - Non Glyceride Fractions? These are water-insoluble, with their content varying from 0.5-7% of the unsaponifiable matter. Rice bran oil contain
Economic Dimensions of Financing Healthcare Establishment of adequate healthcare services, accessible/affordable to all sections of the society, is an important function of th
A decrease in blood plasma levels of calcium will lead to A. an increase in the calcium ion excretion in the urine. B. an increase in the calcium ion absorption from the con
Explain Prosoma in details. First tagma of a cheliciform consisting of the first six segments of the body. Appendages on the prosoma are involved in locomotion and feeding. Pro
Hydra – Metazoa The animals of phyla Cnidaria and Ctenophora are made up of only two germ layers: ectoderm which forms the outer covering of the animal and endoderm which is t
BEE DISEASES - Suffer from nosema diseases caused by Nosema apis. SILK WORM DISEASES - Pebrine disease caused by Nosema.
Hydrocolloids are extremely versatile and are used for many other purposes including: (a) Production of pseudoplasticity (i.e. fluidity under shear) at high temperatures to ea
State three ways in which the absorbing surface of the small intestine is increased. The absorbing surface of the small intestine is increased by:- (a) being very long
To show the effects of yeast on dough Mix together some sugar, water and flour in the proportions to make good bread dough. Divide the dough into two equivalent parts. Stir a h
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