Late blight of potato is caused by from Biology Morphology of Fl

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 Multiple Choice QuestionsMultiple Choice Questions

221.

Tetradynamous stamens are found in family

  • Malvaceae

  • Solanaceae

  • Cruciferae

  • Liliaceae


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222.

Late blight of potato is caused by

  • Ustilago

  • Pseudomonas

  • Phytophthora infestans

  • Colletotrichum falcatum


C.

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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223.

A fruit developed from a condensed inflorescence is :

  • simple fruit

  • aggregate fruit

  • composite fruit

  • etaerio


224.

Divisions characteristic of korper-kappe theory are:

  • anticlinal

  • T-type

  • periclinal

  • irregular


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225.

Epipetalous and syngenesious stamens occur in

  • Solanaceae

  • Brassicaceae

  • Fabaceae

  • Asteraceae


226.

Quiscent centre is present in :

  • root apex

  • shoot apex

  • parenchyma

  • collenchyma


227.

Fruits are formed in :

  • Brassica

  • Fern

  • Cycas

  • Funaria


228.

Pneumatophores are meant for :

  • respiration

  • anchorage

  • protection

  • nutrition


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229.

Mark the correct sequence of layers found in root anatomy:

  • Epiblema, cortex, endodermis, pericycle

  • Cortex, epiblema, pericycle, endodermis

  • Epiblema, cortex, pericycle, endodermis

  • Cortex, epiblema, endodermis, epidermis


230.

Capitulum inflorescence is found in :

  • Compositae (Asteraceae)

  • Cruciferae (Brassicaceae)

  • Solanaceae

  • Malvaceae


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