In China rose the flowers are from Biology NEET Year 2013 Free

Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Select the wrong statement

  • Isogametes are similar in structure, function and behaviour

  • Anisogamets differ either in structure, function and behaviour

  • In oomycetes female gamete is smaller and motile, while male gamete is larger and non-motile

  • In oomycetes female gamete is smaller and motile, while male gamete is larger and non-motile

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2.

Which one of the following is not correct statement?

  • Herbarium houses dried, pressed and preserved plant specimens.

  • Botanical gardens have collection of living plants for reference

  • A museum has collection of photographs of plants and animals

  • A museum has collection of photographs of plants and animals

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3.

Isogamous condition with non-flagellated gametes is found in

  • Chlamydomonas

  • Spirogyra

  • Volvox

  • Volvox

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4.

Besides paddy fields, cyanobacteria are also found inside vegetative part of

  • Pinus

  • Cycas

  • Equisetum

  • Equisetum

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5.

Among bitter gourd mustard, brinjal, pumpkin, China rose, lupin, cucumber, sunn hemp, gram, guava, bean, chilli, plum, Petunia, potato tomato, rose, With potato, onion, aloe and tulip, how many plants have hypogynous flower?

  • Six

  • Ten

  • Fifteen

  • Fifteen

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6.

Interfascicular cambium develops from the cells of

  • medullary rays

  • xylem parenchyma

  • endodermis

  • endodermis

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7.

In China rose the flowers are

  • actinomorphic, hypogynous with twisted aestivation

  • actinomorphic, epigynous with valvate aestivation

  • zygomorphic, hypogynous with imbricate aestivation

  • zygomorphic, hypogynous with imbricate aestivation


A.

actinomorphic, hypogynous with twisted aestivation

Actinomorphic  (star-shaped) can be divided into 3 or more identical sectors, which are related to each other by rotation about the centre of the flower, e.g., china rose. Zygomorphic flowers can be divided by only a single plane into two mirror-image halves., e.g., orchids.
Valvate aestivation: The sepals or petals in whorl just touch one another at the margin, e.g., Calotropis.
Twisted aestivation: One margin of the appendage overlaps that of the next one, e.g., china rose. Imbricate aestivation the margins of sepals or petals overlap but not necessarily in a specific direction. e.g cassia.

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8.

Lenticels are involved in

  • Transpiration

  • Gaseous exchange

  • Food transport

  • Food transport

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9.

Seed coat is not thin, membranous in

  • maize

  • coconut

  • groundnut

  • groundnut

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10.

Transition state structure of the substrate formed during an enzymatic reaction is

  • transient but stable

  • permanent but unstable

  • transient and unstable

  • transient and unstable

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