Multiple Choice Questions

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Late blight of potato is caused by

  • Ustilago

  • Pseudomonas

  • Phytophthora infestans

  • Colletotrichum falcatum


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Phytophthora infestans

Phytophthora infestans, a pathogen of Class Phycomycetes attacks a number of members of family- Solanaceae, the important being potato and tomato. It causes late blight of potato as its destruction is seen in the later stages of the plant.


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Which one of the following is a pseudocarp ?

  • Apple

  • Guava

  • Tomato

  • Banana


Pollinia are found in

  • Rubiaceae

  • Asteraceae

  • Asclepiadaceae

  • Myrtaceae


Tetradynamous stamens are found in family

  • Malvaceae

  • Solanaceae

  • Cruciferae

  • Liliaceae


Fruit of Hibiscus esculentus is

  • capsule

  • cypsela

  • legume

  • pome


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Vivipary is shown by

  • Cocos

  • Squash

  • Rhizophora

  • All of the above


Divisions characteristic of korper-kappe theory are:

  • anticlinal

  • T-type

  • periclinal

  • irregular


Wilting of leaves at noon and their recovery toward evening is known as

  • incipient wilting

  • temporary wilting

  • midday desiccation

  • permanent wilting


Wood commonly used for making cricket bat is

  • Cedrus

  • Salix

  • Tectona

  • Morus


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A fruit developed from a condensed inflorescence is :

  • simple fruit

  • aggregate fruit

  • composite fruit

  • etaerio


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