Which of the following plants are used as green manure in crop fields and in sandy soils?

• Saccharum munja and Lantana camara

• Dichanthium annulatum and Azolla nilotica

• Crotalaria juncea and Alhagi camelorum

• Calotropis procera and Phyllanthus niruri

Select the wrongly matched pair

• Fibre - Sunhemp

• Spice - Belladonna

• Edible oil - Groundnut

• Fodder - Trifolium

• Fodder - Trifolium

Jumping genes in maize were discovered by

• Hugo de Vries

• Barbara McClintock

• TH Morgan

• Mendel

• the deficiency of nitrogen

• a bacterium

• a fungus

• a virus

In honey bee, royal jelly is secreted from :

• corp gland

• wax gland

• pharyngeal gland

• salivary gland

Triticum vulgare has been found to be presently evolved as

• diploid

• tetraploid

• pentaploid

• hexaploid

Late blight of potato is caused by

• Cystopus

• Phytophthora

• Alternaria

• Ustilago

The semi dwarf wheat which was instrumental in increasing
wheat production was developed by

• Alexander von Humboldt

• Paul Ehrlich

• Dr. Kurien

• Edward Jenner

• Edward Jenner