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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.
Left internal mammary artery (LIMA): It is most often used for bypassing left anterior descending (LAD) coronary artery and its diagonal branch. The right internal mammary
Milk Fats Fats of this group are derived from the milk of ruminants, particularly cows and buffaloes. Although the major fatty acids of milk fat are palmitic, oleic and steari
Define Equilibrium between two solid phases and a gas phase? Consider the following reaction equilibrium: 3 CuO(s) + 2NH 3 (g) ↔ 3 Cu(s) + 3H 2 O (g) + N 2 (g) Accordin
What is the nucleolus? The nucleolus is a small and optically dense region in the interior of the cell nucleus. It is made of ribosomic RNA (rRNA) and proteins. Single nucleus
Explain Sound production - Ethological Approach in Taxonomy The most used, ethological feature in identification is the sound produced by various species of animals. This is
Do echinoderms present internal or external fecundation? Is there sex division among individuals? The fecundation in echinoderms is external; gametes are liberated in water whe
Quantitative changes The quantitative changes in the availability of the active biomolecules occur in order to compensate for the loss of efficiency of the system caused by th
What is Implant Failure Implant Failure : The total failure of implant to fulfil its purpose which are49 Surgical Complications, Long Term Implant Failures and Ma
What is arterial switch operation explain briefly? Arterial Switch Operation: Switching the Great arteries to restore the normal Ventriculoarterial connections. The coronary
Comparison with Amphibian Gastrulation On comparison of chick gastrulation along with amphibian gastrulation you will find many similarities along with significant difference
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