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What is the system that permits movement and fixation to echinoderms?
The system that allows movement and fixation to substrates in echinoderms is known as the ambulacral system. In these animals water enters by a structure called madreporite, passes by 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 filled and emptied by water therefore acting as suckers
On living organism Air pollution causes following effects on living organism: (a) Effects on humans: 1. Carbon monoxide reduces the oxygen carrying cap
The cell cycle undergoes a sequence of changes which involve a period of growth replication of DNA, Followed by cell division. This sequence of changes is called cell cycle.
what is mean by fisson
All tissues have some capability for synthesis of the non-essential amino acid remodeling, amino acids and conversion of non-amino acid carbon skeletons into amino acids and other
how was life originated
Q. Describe U - Waves? The U-wave is usually upright if the T is also upright and is highest at low rates. When the heart rate increases to more than 90, the U-wave is rarely v
Light and Heavy Soils The presence of silt and especially clay in a soil imparts to it a fine texture, and a slow water and air movement. Such a soil is highly plastic becoming
STIMULENT S - It makes a person more wakeful, alert and active. (i) Caffeine ( C 8 H 10 N 4 O 2 ) - It is 1,3,7-trimethylxanthine obtained from tea leaves ( Thea si
What is Pressure Support Ventilation (PSV)? In a spontaneously breathing patient, each breath may be augmented with a preset level of pressure. The extent of support depends o
i need examples of animals that belongs to vertevrate pisces
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