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Biological Classification
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Maximum nutritional diversity is found in the groupBacteria (Monera) show the most extensive metabolic diversity.
They may be photosynthetic autotrophs, chemosynthetic autotrophs or heterotrophs (saprophytes, parasites, symbionts).
Plants are mostly autotrophic, and fungi and animals are heterotrophic. -
Which statement is wrong for viruses?Viruses are obligate parasites, are not affected by antibiotics, and direct the host machinery to make their nucleic acids and proteins.
Their capsids may be helical (e.g. TMV), polyhedral (e.g. adenovirus) or complex (e.g. bacteriophage).
So the statement that all of them have helical symmetry is wrong. -
The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are the ones categorised asHeterotrophic bacteria are the most abundant in nature; most are important decomposers.
They are helpful in making curd from milk, producing antibiotics and fixing nitrogen in legume roots. -
Which one single organism or the pair of organisms is correctly assigned to its or their named taxonomic group?Yeast (Saccharomyces) is a unicellular fungus of the class Ascomycetes.
Nostoc and Anabaena are cyanobacteria (Monera); Paramecium and Plasmodium are protists while Penicillium is a fungus; a lichen is an association of an alga and a fungus. -
Nuclear membrane is absent inNostoc is a cyanobacterium, a prokaryote; its genetic material is not enclosed by a nuclear membrane.
Penicillium and Agaricus (fungi) and Volvox (alga) are eukaryotes with a nuclear membrane. -
The cyanobacteria are also referred to asCyanobacteria have chlorophyll a like green plants and are photosynthetic autotrophs; they are also called blue-green algae.
Golden algae are chrysophytes, which are protists.