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Egg Envelopes
Like any other cell, all the eggs are covered by the cell membrane or plasmalemma It is with two layers of about 50 A? (unit membrane) separated by a gap of 60 A?. In addition to plasmalemma, the eggs of practically all animals are surrounded by special egg envelopes (or egg membranes).
Based on their origin, types of egg envelopes are
Cytochemistry It is well known that certain stains and dyes specifically combine with certain chemical components of the cell. Cytochemical techniques take advantage of this fa
UNDERS T ANDIN G LIF E - Presence of protoplasm is the important feature of life which acts the site of metabolism. Maintenance of life by protoplasm requires conti
Why there is difference in the colour obtained for the dextrin solution (ammonium sulphate and dextrin )when brought to iodine test Respetively by first half saturation test and t
Stethoscope Stethoscope is used for listening to the internal sounds of a body. Stethoscopes vary in their design and material. Most are made of Y-shaped rubber tubing. This sh
Total Artificial Heart : Jarvik seven was the first successful total artificial heart supporting the patient for 112 days. The disadvantage is that the patient has to be connecte
How is the nervous system of molluscs organized? Molluscs have well-developed sensory structures. It is established that cephalopods, such as squid and octopus, have eyes with
What is the difference between an ecological niche and a habitat? An ecological niche is a set of peculiar activities, resources and methods that a species explores to survive
How recombinant DNA Technology can help sustain growing human population?
What are the five conditons that can cause evolution to take place?
activity
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