CBSE
In honey bee, royal jelly is secreted from :
corp gland
wax gland
pharyngeal gland
salivary gland
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
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
Late blight of potato is caused by
Cystopus
Phytophthora
Alternaria
Ustilago
the deficiency of nitrogen
a bacterium
a fungus
a virus
Triticum vulgare has been found to be presently evolved as
diploid
tetraploid
pentaploid
hexaploid
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