Multiple Choice Questions

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Perisperm is

  • degenerate part of synergids

  • peripheral part of endosperm

  • degenerate part of secondary nucleus

  • remnant of nucellus


D.

remnant of nucellus

Perisperm is the remnant of nucellus. It is found in Piperaceae and Scitaminaceae. It is formed when the nucellus is not completely used up and is present in the form of a thin layer in the seed enclosing the embryo and the endosperm


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Which of the following as a living fossil 

  •  Pinus 

  • Gnetum

  • Ginkgo 

  • Riccia


Transformation in bacteria was discovered by

  • Lederberg 

  • Griffith

  • Avery et. al

  • Tatum


Green plants constitute

  •  first trophic level

  • second trophic level

  • third trophic level

  • complete food chain


The plant that is characteristics component of mangrove vegetation

  • Rhizophora mangel

  • Ficus religiosa

  • Mangifera indica

  • Prosopis specigera


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An orthotropus ovule is one in which micropyle and chalaza are

  •  in straight line of funiculus

  • parallel of funiculus

  • at right angles to funiculus

  • oblique to funiculus


Kappa particles indicate

  • nuclear inheritance

  • cytoplasmic inheritance

  • mutation

  • nucleo-cytoplasmic inheritance


Husband has blood group A and wife has blood group B. What is the blood group of children

  • A

  • B

  • AB

  • A, B, AB or 0


Which insect is useful for us

  • Periplaneta

  •  Musca

  • Bombyx

  • Mosquitoes


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The arrangement of genes on chromosomes is

  • linear 

  • ovoid

  • diffused 

  • spiral