Multiple Choice Questions

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Which one of the following is considered important in the development of seed habit?

  • Dependent sporophyte

  • Heterospory

  • Haplontic life cycle

  • Haplontic life cycle


B.

Heterospory

Heterospory is the production of spores of two different sizes and of two different sizes and of two different development patterns. Heterospory is an expression sex determining spores of the plant. It is the most important evolutionary development in the vascular plants because it has ultimately lead to seed development, eg, Selaginella, Salvinia,Azolla, etc.

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Reduction is vascular tissue, mechanical tissue and cuticle is characteristic of 

  • xerophytes

  • mesophytes

  • epiphytes

  • epiphytes

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T O Diener discovered a

  • free infectious RNA

  • free infectious DNA,

  • infectious protein

  • infectious protein

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Globulins contained in human blood plasma are primarily involved in 

  • defence mechanisms of the body 

  • the osmotic balance of body fluids

  • oxygen transport in the blood

  • oxygen transport in the blood

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A fruit developed from hypanthodium inflorescence is called

  • hesperidium 

  • sorosis

  • syconus

  • syconus

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Cyclic-photophosphorylation results in the formation of 

  • NADPH

  • ATP and NADPH

  • ATP, NADPH and O2

  • ATP, NADPH and O2

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An example of axile placentation is 

  • Argemone 

  • Dianthus

  • Lemon

  • Lemon

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The bacterium Bacillus thuringiensis is widely used in contemporary biology as a/an

  • Indicator of water pollution

  • insecticide

  • agent for the production of dairy products

  • agent for the production of dairy products

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Peripatus is a connecting link between

  • Ctenophora and Platyhelminthes

  • Mollusca and Echinodermata

  • Annelida and Arthropoda

  • Annelida and Arthropoda

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Which of the following is a symbiotic nitrogen fixer?

  • Glomus

  • Azotobacter

  • Frankia

  • Frankia

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