NEET Biology Solved Question Paper 2009

Multiple Choice Questions

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Lichen is the pioneer vegetation on which succession?

  • Hydrosere

  • Lithosere

  • Psammosere

  • Xerosere

B.

Lithosere

Lithosere is a type of xerosere originating on bare rock surfaces. The original substratum is deficient in water and lacks any organic matter having only minerals in disintegrated state. The pioneer vegetaion is therfore, lichens.

Hydrosere originates in a pond with the colonization of some phytoplanktons which form the pioneer plant community.

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    In Pinus, male cone bears a large number of

    • ligules

    • anthers

    • micro- sporophylls

    • mega- sporophylls

    Answer

    Which is always present in photochemical smog?

    • O3

    • CO2

    • SO2

    • CH4

    Answer

    Cleavage polyembryony occurs in

    • Pinus

    • Mini Cycas

    • Cycas

    • Ephedra

    Answer

    Initiation codon is

    • UUU

    • UGA

    • AUG

    • UAG

    Answer
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    DNA element with ability to change position is called

    • cistron

    • transposon

    • intron

    • recon

    Answer

    The soil which is transported by wind is known as

    • colluvial

    • eolian

    • aluvial

    • glacial soil

    Answer

    Streptomycin is obtained from

    • Streptomyces griseus

    • S. aureofaciens

    • S. venezuelae

    • S. ramosus

    Answer

    Decomposers are

    • autotrophs

    • autoheterotrophs

    • organotrophs

    • heterotrophs

    Answer
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    DNA mutiplication is called

    • translation

    • replication

    • transduction

    • transcription

    Answer