Phellogen and phellem respectively denote from Biology Plant Gro

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

31.

Pneumatophores occur in

  • Halophytes

  • Free-floating hydrophytes

  • Submerged hydrophytes

  • Carnivorous plants


32.

Plants having little or no secondary growth are

  • Grasses

  • Deciduous angiosperms

  • Cycads

  • Conifers


33.

Sweet potato is a modified

  • Stem

  • Adventitious root

  • Rhizome

  • Tap root


34.

Which one of the following generally acts as an antagonist to gibberellins?

  • Zeatin

  • Ethylene

  • ABA

  • IAA


Advertisement
Advertisement

35.

Phellogen and phellem respectively denote

  • Cork and cork cambium

  • Cork cambium and cork

  • Secondary cortex and cork

  • Cork and secondary cortex


A.

Cork and cork cambium

In the dicot stem, the cortical cells get differentiated to give rise to another meristematic tissue, which is called cork cambium or phellogen. On the other side, it forms phellem (cork) and in the inner region, it forms secondary cortical cells (phelloderm).


Advertisement
36.

Which one correctly describe reproduction and life cycle of fern?

  • Spore → Gamete → Prothallus → Sporophyte

  • Gamete → Spore → Prothallus → Plant

  • Prothallus → Sporophyte → Gamete → Fern

  • Sporangia → Spore → Prothallus → Sporophyte → Plant


37.

Which of the following is not an auxin?

  • IM

  • IBA

  • Zeatin

  • NM


38.

Which of the following properties is shown by cytokinins?

  • Delay leaf senescence

  • Cause leaf abscission

  • Promote seed dormancy

  • Promote stornatal closing


Advertisement
39.

Genetic dwarfism can be overcome by

  • Gibberellin

  • Ethylene

  • Auxin

  • ABA


40.

Hormone inducing fruit ripening is

  • Cytokinin

  • Ethylene

  • Aabscissic acid

  • Gibberellic acid


Advertisement