Ownclasses

Select the correct statement

  • Salvinia, Gingko and Pinus all are gymnosperm

  • Sequoia is oneis one ot the talles trees

  • The leaves of gymnosperm are not well adapted to extremes of climate

  • Gymnosperms are both homosporous and heterosporous

The scutellum observed in a grain of Wheat or maize is comparable to which part of the seed in other monocotyledons?

  • Cotyledon

  • Endosperm

  • Aleurone layer

  • Plumule

Which one of the following is a correct statements?

  • Pteridophyte gametophyte has a protonemal and leafy stage

  • In gymnosperms female gametophyte is free-living

  • Antheridiophores and archegoniophores are present in pteridophytes

  • Origin of seed habit can be traced in pteridophytes

The unequivocal proof of DNA as the genetic material came from the studies on a 
I) The sporophyte in liverworts is more elaborate than that in mosses
II) Salvinia is heterosporous
III) The life -cycle in all seed - bearing plants is diplontic
IV) In pinus male and female cones are borne on different trees

  • Statements (I) and (III)

  • Statement (I) and (IV)

  • Statements (II) and (III)

  • Statements (I) and (II)

Which one of the following statements is wrong?

  • Algin and carrageenian are products of algae.

  • Agar-agar is obtained from Gelidium and Gracilaria

  • Chlorella and Spirulina are used as space food

  • Mannitol is stored food in Rhodophyceae

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