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Q What is the system that permits fixation and movement to echinoderms?
The system that permits fixation and movement to substrates in echinoderms is called the ambulacral system. In these animals water enters through a structure called madreporite passes through channels and reaches the ambulacral feet in the undersurface of the body. In the ambulacral region in contact with the substrate there are tube feet emptied and filled by water thus acting as suckers.
functions of arteries in mammals
Grazing Food Chain - Food Chain Grazing food chains are quite familiar to most of us. Cow or deer grazing in a field represent a grazing food chain. Similarly, eating of phyto
Poverty and Malnutrition Poverty and malnutrition are closely related. As noted before, many elementary aspects of being poor like hunger, inadequate health care, unhygienic l
Define the Basic Concepts behind the Spectral Techniques? Energy is transmitted via electromagnetic waves that are characterized by their frequency and wavelength. The physical
Composition of oil gas is CH 4 = 25-30%; H 2 = 50-55%; CO = 10-12%; CO 2 = 3% It calorific value is 4500-5400 kcl/m 3 . It is used as laboratory gas. Oil gas is prepared b
The conduction of impulse in a nerve fibre is. a electrochemical process. Maximum speed of transmission of nerve impulse can be 13 metre/second due to axoplasm is much resistant to
HOW BORN THE BABY
Are the xylem and the phloem made of living cells? The cells that constitute the xylem ducts are dead cells killed by lignin deposition. The cells of the phloem are living
Q: What are disaccharides? Although theoretically disaccharides could be made up of two trioses, tetroses, pentoses but all naturally occurring disaccharides contain hexose mol
Q. What is the main molecule responsible for the absorption of photic energy for photosynthesis? And where is that molecule located in photosynthetic cells? The chlorophyll mol
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