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Q. What are the basic morphological features of echinoderms?
Echinoderms, as the name indicates (derma = skin, echino = spiny), are creatures with spines originated from an endoskeleton. Their endoskeleton is made of calcareous plaques that besides spines contain pedicellaria, small pincers used to clean the body and to help the capturing of prey. They also present a hydrovascular system known as the ambulacral system. Adult echinoderms have pentaradial symmetry the radial symmetry in these animals is secondary present only in adults.
Is the transportation of gases in tracheophytes made through the vascular tissues? The Carbon dioxide and The Oxygen are not transported through the xylem or phloem. These gase
The biological conversion of atmospheric nitrogen into ammonia in the group of plants known as legumes (peas, beans lentils and clover etc.) is achieved by the action of soil bacte
State in detail about rocks A mass of mineral matter is called rock. It may be composed of one or more minerals. Some rocks are hard and compact e.g. granite and basalt, whil
What is Gene therapy Gene therapy targets non germ line cells, ie somatic cells, so will not directly affect gene pool. The frequency of the allele for the genetic disease w
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Define the Water Bath with Shaker? An electric water bath with a shaker that can hold test tubes as well as conical flasks. When on a non-shake mode, it acts as a simple water
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Explain TechnologicaI advances of clinical dietitian TechnologicaI advances in nutritional support for the critically ill have enhanced the clinical dietitian's role. In the
Is herbivorism a form of predatism? Herbivorism is a type of predatism in which first order consumers feed from producers (plants or algae). For instance, birds and fruits, hum
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