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Q. Scheme of Classification of phylum hemichordate?
These are about 90 species of hemichordates. All are marine and live in the open sea or in muddy sediments. Hemichordata were once included in the phylum Chordata and were grouped as invertebrate (backboneless) chordates under 'protochordates' (first chordates). They have a dorsal nerve cord, often hollow, developed from the dorsal epidermis. The longitudinal stiffening stomatochord is no more thought to be the homologue of the notochord and this distinction justified the separation of the hernichordata from the chordata.
Following statement true for prokaryotic or eukaryotic? They use deoxyribonucleic acid as their major information storage molecule.
Define Oral rehydration for treatment for pem? Since diarrhoea is very common in severe PEM, correction of dehydration is the first step in the treatment. Homemade (salt-sugar
A useful way to grow seeds Tie a piece of cloth over the mouth of an old potted meat jar. Permit extra cloth to hang down the sides and dip in about 2 cm of water contained in
Why does DNA twist? If it did not twist, would you expect it to fit into the miniscule cell? As we all know, if we join all of the DNA molecules from a person's body end to en
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How does the absence of a nuclear envelope in prokaryotes prevent prokaryotes from controlling gene expression by modifying RNA after transcription? Without a nuclear envelope
With the survival and well-being of humans beings so heavily dependent on biodiversity, its economic value assumes considerable importance. For instance the economic value of ecosy
Describe in detail about the chlorophyll molecule Each chlorophyll molecule contains magnesium ion, there could be no green plants without magnesium. As magnesium is present in
In the above sections we discussed in detail the fossil record of primates in general and more particularly those of apes and the humans. Despite the fact that in recent years a nu
Q. Besides the skin what are the other coverings of the body? Besides the skin there are other covering tissues made of epithelium over other tissue layers. They are the tissue
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