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 Multiple Choice QuestionsMultiple Choice Questions


Porous wood has abundance of 

  • vessels

  • fibres only

  • tracheids

  • sieve tubes


Assertion : Monocot stem bears collateral open vascular bundles.

Reason : If cambium is absent such vascular bundles are called closed type.

  • If both Assertion and Reason are true and Reason is the correct explantion of Assertion

  • If both Assertion and Reason are true and Reason is not the correct explanation of Assertion

  • If Assertion is true but Reason is false

  • If Assertion is false but Reason is true.


In a dicotyledonous stem, the sequence of tissues from the outside to the inside is

  • phellem - pericycle - endodermis - phloem

  • phellem - phloem - endodermis - pericycle

  • phellem - endodermis - pericycle - phloem

  • pericycle - phellem - endodermis - phloem


Plasmodesmata connections help in

  • cytoplasmic streaming

  • synchronous mitotic divisions

  • locomotion of unicellular organism

  • movement of substances between cells


Periderm includes

  • cork cambium only

  • cork cambium and cork

  • cork and secondary cortex

  • cork cambium, cork and secondary cortex


Largest number of chloroplast is found in :

  • palisade tissue

  • spongy tissue

  • transfusion tissue

  • bundle sheath cells


Passage cells are found in

  • dicot stem

  • monocot root

  • monocot stem

  • all of these


Assertion : Water and mineral uptake by root hairs from the soil occurs through apoplast until it reaches endodermis.

Reason : Casparian strips in endodermis are suberized

  • If both Assertion and Reason are true and the reason is the correct explanation of the assertion

  • If both Assertion and Reason are true but the reason is not the correct explanation of the assertion

  • If Assertion is true statement but Reason is false

  • If both Assertion and Reason are false statements


Velamen is a specialized tissue found in

  • aerial roots of orchids

  • succulent leaves

  • pneumatophores

  • stilt roots


The quiescent centre in root meristem serves as a

  • site for storage of food which is utilized during maturation

  • reservoir of growth hormones

  • reserve for replenishment of damaged cells of the meristem

  • region for absorption of water