Multiple Choice Questions

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In Spirogyra sometimes a ladder like structure  is present due to

  • vegetative reproduction

  • asexual reproduction

  • lateral conjugation

  • scalariform conjugation


D.

scalariform conjugation

Sexual reproduction in Spirogyra takes place by conjugation. Scalariform conjugation occurs between the cells belonging to different filaments. Hence, these species are heterothallic. Lateral conjugation is primitive than scalariform conjugation.


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The magnitude of root pressure ranges from

  • 2-5 atm

  • 0.1-0.2 atm

  • 1-5 atm

  • 4-6 atm


The Orobanche plant is

  • partial stem parasite

  • total root parasite

  • symbiont

  • total stem parasite


Which of the following element plays an important role in nitrogen fixation

  • Zinc

  • Molybdenum

  • Manganese

  • Copper


Yeast belongs to which class

  • Basidiomycetes

  • Eumycetes

  • Ascomycetes

  • None of these


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'Reindeer moss' is common name for

  • Funaria hygrometrica

  • Marchantia sp

  • Cladonia rangifera

  • Polytrichum sp


The terminal electron acceptor during electron transport system is

  • oxygen

  • cyto a3

  • cyto c

  • plasto quinone


Glycolysis occurs in

  • cytosol

  • mitochondria

  • Golgi complex

  • ribosomes


Periderm includes

  • cork cambium only

  • cork cambium and cork

  • cork and secondary cortex

  • cork cambium, cork and secondary cortex


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Algal zone is present in

  • normal root of Cycas

  • coralloid root of Cycas

  • normal root of Pinus

  • stem of Cycas