Multiple Choice Questions

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An aggregate fruit is one which develops from

  • multi carpellary syncarpous gynoecium

  • Multi carpellary apocarpus gynoecium

  • complete inflorescence

  • complete inflorescence


B.

Multi carpellary apocarpus gynoecium

Aggregate fruits of etecrio are those fruits that develop from the merger of multiccarpelllary apocarpus gynoecium ( ovary). In contrast, a simple fruit develops from one ovary, Aggregate fruit may also be called accessory fruits in which part of the flower and form part of the fruit, e,g., raspberry, etc.

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Anoxygenic photosynthesis is characteristic of 

  • rhodospirlllum

  • Spirogyra

  • Chlamydomonas

  • Chlamydomonas

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A few normal seedlings of tomato were kept in a dark room. After a few days they were found to have become white - coloured like albinos. Which of the following terms will you use to describe them?

  • Mutated

  • Embolised

  • Etiolated

  • Etiolated

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Which one of the following growth regulators is known as stress hormone?

  • abscsic acid

  • Ethylene

  • GA3

  • GA3

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Male gametophyte with least number of cell is present in

  • Pteris

  • Funaria

  • Lillium

  • Lillium

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Viruses have

  • DNA enclosed in a protein coat

  • prokaryotic nucleus

  • single chromosome

  • single chromosome

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The first human hormone produced by recombinant 

  • insulin

  • estrogen

  • thyroxin

  • thyroxin

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An alga which can be employed as food for human being is 

  • Ulothrix

  • Chlorella

  • Spirogyra

  • Spirogyra

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Select the taxon mentioned that represents both marine and freshwater species

  • Echinoderms

  • Ctenophora

  • Cephalochordata

  • Cephalochordata

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Which one of the following living organisms completely lacks a cell wall?

  • Cyanobacteria

  • Sea-fan (Gorgonia)

  • Saccharomyces

  • Saccharomyces

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