Keel is the characteristic feature of flower of from Biology NE

Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

In which of the following gametophyte is not independent free-living?

  • Funaria

  • Marchantia

  • Pteris

  • Pteris

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2.

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

  • Chlorella and Spirulina are used as space food

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3.

The guta of cow and buffalo possess

  • Fucus sp

  • Chlorella sp

  • Methanogens

  • Methanogens

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4.

Keel is the characteristic feature of flower of

  • Tulip

  • Indigofera

  • Aloe

  • Aloe


B.

Indigofera

Keel is petal is vexillary aestivation, which is a characteristic of family -  Fabaceae, i.e. Indigofera tomato belongs to family - Solanaceae, tulip and while aloe to Liliaceae.

Papilionaceae (e.g. Indigofera, pea) is sub-family of Fabaceae, which has bilateral symmetry with corolla consist of 5 petals. It follows vexillary aestivation. A single upper posterior petal is known as banner.  Two lateral compressed petals called wings and a pair of anterior small fused petal forms keel. Keel has concave sides which make them fused at bases. 


Hence, keel is the characteristic feature of flower of family - Papilionaceae. e.g. Indigofera.

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5.

The structures that are formed by stacking of organized flattened membranous sacs in the chloroplasts are

  • cristate

  • grana

  • stroma lamellae

  • stroma lamellae

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6.

The chromosomes in which centromere is situated close to one end are

  • metacentric

  • acrocentric

  • telocentric

  • telocentric

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7.

Select the correct matching in the following pairs

  • Smooth ER — Oxidation of phospholipids

  • Smooth ER — Synthesis of lipids

  • Rough ER — Synthesis of glycogen

  • Rough ER — Synthesis of glycogen

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8.

Typical growth curve in plants is

  • sigmoid

  • linear

  • Stair-steps shaped

  • Stair-steps shaped

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9.

Typical growth curve in plants is 

  • sigmoid

  • linear

  • stair-steps shaped

  • stair-steps shaped

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10.

Which one gives the most valid and recent explanation for stomatal movements?

  • Transpiration

  • Potassium influx and efflux

  • Starch hydrolysis

  • Starch hydrolysis

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