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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.
Compare and contrast the effect of a deletion in the operator of the lactose operon with one in the operator of the tryptophan operon.
what direct or indirect effect is " acid rain" thought to have on (I) lakes, (ii) forests and (iii) buildings
Dinitrophenol, DNP, was prescribed in low doses in the 1940's to help obese patients lose weight. It's use for this purpose was discontinued when several users died. DNP makes the
Q. What do you know about Tricuspid stenosis? It is rare disease, with rheumatic etiology seen in 90 per cent of cases. In patients with rheumatic mitral stenosis only 3-5 per
Pox diseases Small-pox in human beings and pox in a few animal species are closely related to each other. It is shown by the fact that the vaccine for the prevention of small
Q. Explain the Spring clip model? The spring clip model differs from the spring model in a way that the force applied is comparatively slower. This also depicts elasticity or p
Define Most Probable Number (MPN) Method? The MPN method is like agar shake tube method where no agar is used. The dilutions of the microbial suspension are made in liquid medi
Q. What are the major biological functions in which chlorine ions participate? Like sodium cations, chlorine anions actively participate in the regulation of the osmolarity of
secondary growth in roots
How to use microorganisms to control diseases
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