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ERRORS IN FERTILIZATION -
1. Polyspermy - When more than one sperms are fused in an ovum, this condition is called polyspermy.
2. Polygynae - During oogenesis after the meiosis polar body I and II are not seperate, in this condition one male pronuclei fused to two female pronuclei. This condition is called polygynae.
3. Polyandry - When two male pronuclei fused with the one female pronuclei is called as polyandry, in this condition embryo is dead.
4. Gynogenesis - When sperm contact to the ova than ova is activated but pronuclei of sperm not fused to female pronuclei.
5. Partial fertilization - In this type of fertilization pronuclei of sperm fertilized to a blastomere.
6. Androgenesis - During fertilization process, pronuclei of ova if inactivated, during development process pronuclei of sperm participate.
Types of Osmotic Exchanges The osmotic exchanges that take place between an animal and its environment are of two different types: Obligatory exchanges and Regulated
Difference between Artificial selection and natural selection - S.No Artificial selection Natural selection 1. It
Extraoral Examination It includes examining the following basic structures which are related to oral cavity. TMJ: Rule out any tenderness, crepitus, clicking or snapping
Concerning the number of hosts how are parasites classified? Parasites that need only one host are known as monoxenous parasites. Parasites that need more than one host for th
Cell theory is a theory that asserts that the cell is the ingredient unit of the living beings. Before the discovery of the cell, it was not examined that the living beings were
characteristics of class mamalias
Nuclear run-on is a technique used to estimate the relative rate of the transcription of a given gene, as opposed to steady-state level of the mRNA transcript (which is influenced
quality is expensive. discuss
Define Proteins as regulators of water balance? As substrates and solutes are transferred or exchanged across membranes, water has a tendency to follow to maintain equal osmoti
Elaborate the term - Gill slits. Lateral opening in the wall of pharynx which allows water to enter into mouth and exit through the pharynx. This is one of the ancestral charac
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