The modified stem of Opuntia is from Biology Plant Kingdom

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 Multiple Choice QuestionsMultiple Choice Questions

71.

The protein rich alga is

  •  Ulothrix

  •  Spirogyra

  •  Nostoc

  •  Chlorella


72.

The amphibians of plant kingdom are

  • algae 

  • bryophytes

  • thallophytes 

  • floating plants


73.

The plant Cuscuta shows maximum photosynthesis in

  • red light

  • blue light

  • green light

  • no photosynthesis at all


74.

Top-shaped multiciliate male gametes and the mature seed which bears only one embryo with two cotyledons, are characteristic features of

  • polypetalous angiosperms

  • gamopetalous angiosperms

  • conifers

  • cycads


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75.

Which one of the following pairs is mismatched?

  • Savanna - Acacia trees

  • Prairie - Epiphytes

  • Tundra - Permafrost

  • Coniferous forest - Evergreen trees


76.

Tea and coffee are affected by

  • Phytophthora

  • Cephaleuros

  • Herviella

  • Albugo candida


77.

Though Cycas has 2 cotyledons, this is not included in dicot because

  • naked ovule

  • they have megaspore

  • appears as palm tree

  • has compound leaves


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78.

The modified stem of Opuntia is

  • phyllode

  • phylloclade

  • cladode

  • stamroinode


B.

phylloclade

When the stem is flattened and function as leaf, it is called phylloclade or cladophyll.

Phyllode is a flattened petiole or leaf rachis that resembles and functions as a leaf and may or may not be combined with an actual lamina.

Cladode is a flattened origin arising from the stem of a plant. 

Staminode is a sterile or abortive stamen, frequently resembling a stamen without its anther.


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79.

Mannitol is reserve food in

  • Rhodophyceae

  • Chlorophyceae

  • Phaeophyceae

  • Xanthophyceae


80.

Plants growing on sand and gravel are called

  • eremophytes

  • psammophytes

  • psilophytes

  • oxylophytes


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