In pteridophytes, phloem is without from Biology Plant Kingdom

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 Multiple Choice QuestionsMultiple Choice Questions

41.

Which one is wrongly matched?

  • Uniflagellate gametes – Polysiphonia

  • Biflagellate zoospores – Brown algae

  • Unicellular organism – Chlorella

  • Gemma cups – Marchantia


42.

After karyogamy followed by meiosis, spores are produced exogenously in

  • Neurospora

  • Alternaria

  • Saccharomyces

  • Agaricus


43.

Identify the wrong combination

  • Dryopteris → Rhizome

  • Cycas → Coralloid roots

  • Volvox → Colonial form

  • Marchantia →Pseudoelaters


44.

Which one of the following is heterosporous?

  • Equisetum

  • Dryopteris

  • Salvinia

  • Adianturn


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45.

Lady finger belongs to family

  • Malvaceae

  • Cucurbitaceae

  • Brassicaceae

  • Liliaceae


46.

The interxylary phloem is found in the stem of

  • Cucurbita

  • Salvia

  • Calotropis

  • None of these


47.

Wound healing is due to

  • Ventral Meristem

  • Secondary meristem

  • Primary meristem

  • All of these


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48.

In pteridophytes, phloem is without

  • bast fibers

  • Sieve tubes

  • Companion cells

  • Sieve cells


C.

Companion cells

In angiosperm, companion cells are living cells along with sieve tube and phloem parenchyma of the phloem. In pteridophytes and gymnosperm, phloem is without companion cell.


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49.

 Fern spores are usually

  • Haploid

  • Diploid

  • Triploid

  • Tetraploid


50.

Which of the following supports a dense population of plankton and littoral vegetation?

  • Oligotrophic

  • Eutrophic

  • Lithotrophic

  • Agroecotrophic


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