Please select a subject first
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Match the following:
| Column I | Column II | ||
| (a) | Operculum | (i) | Ctenophora |
| (b) | Parapodia | (ii) | Mollusca |
| (c) | Scales | (iii) | Porifera |
| (d) | Comb plates | (iv) | Reptilia |
| (e) | Radula | (v) | Annelida |
| (f) | Hairs | (vi) | Cyclostomata and Chondrichthyes |
| (g) | Choanocytes | (vii) | Mammalia |
| (h) | Gill slits | (viii) | Osteichthyes |
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Prepare a list of some animals that are found parasitic on human beings.
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Give a brief account of viruses with respect to their structure and nature of genetic material. Also name four common viral diseases.
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Organise a discussion in your class on the topic- Are viruses living or non-living?
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Contagium vivum fluidum was proposed by ______.
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Viruses are non-cellular organisms but replicate themselves once they infect the host cell. To which of the following kingdom do viruses belong to?
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A virus is considered as a living organism and an obligate parasite when inside a host cell. But virus is not classified along with bacteria or fungi. What are the characters of virus that are similar to non-living objects?
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How are viroids different from viruses?
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Difference between Virus and Viroid is ______.
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What do the terms phycobiont and mycobiont signify?
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Associations between Mycobiont and Phycobiont are found in ______.
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What is the basic theme of organisation in the periodic table?
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Explain the Formation of a Chemical Bond.
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Write Lewis symbols for the following atoms and ions: S and S2–.
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Write Lewis symbols for the following atoms and ions: Al and Al3+.
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Write Lewis symbols for the following atoms and ions H and H–.
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Use Lewis symbols to show electron transfer between the following atoms to form cations and anions:-
K and S
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Use Lewis symbols to show electron transfer between the following atoms to form cations and anions:
Ca and O
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Use Lewis symbols to show electron transfer between the following atoms to form cations and anions:
Al and N
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A thermodynamic state function is a quantity ______.
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