Heterospory is the production of from Biology NEET Year 2004 Fre

Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

31.

The real forces responsible for the movement of water from one cell to another cell is mainly

  • Osmotic Pressure (OP)

  • Turgor Pressure (TP)

  • Diffusion Pressure Deficit (DPD)

  • imbibition


32.

The amphibians of plant kingdom are

  • multicellular non motile algae

  • bryophytes with simple internal organisation

  • unicellular motile algae

  • pteridophytes with complex internal organisation.


33.

Black rust of wheat is a fungal disease caused by

  • Melampsora lini

  • Claviceps Purpurea

  • Albugo candida

  • Puccinia graemzinis tritici


34.

In Chlorophyceae the mode of sexual reproduction is

  • anisogamy

  • isogamy

  • oogamy

  • all of these


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35.

In which genera endospores are formed for reproduction

  • Monococcus and Clostridium

  • Bacillus and Clostridium

  • Mucor and Bacillus

  • None ofthe above


36.

Agricultural chemicals include

  • growth regulators

  • fertilizers

  • pesticides

  • all of these


37.

CO is harmful to human being because

  • it decreases CO2 concentration

  • it competes O2 to combine with haemoglobin

  • it is carcinogenic

  • it depletes O2 layer


38.

Which of the following is a day neutral plant

  • Helianthus annuus

  • Euphorbia pulcherrima

  • Avena sativa

  • Beta vulgaris


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39.

Which of the following is an antigibberellin

  • Auxin

  • Ethylene

  • ABA

  • Cytokinin


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40.

Heterospory is the production of

  • sexual and asexual spores

  • large and small spores

  • haploid and diploid spores

  • diploid and tetraploid spores


B.

large and small spores

In some pteridophytes two types of spores are formed which differ significantly in their size and also in function. This phenomenon is called heterospory e.g., Selaginella and Marsilea etc.


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