CBSE
Multiple Choice QuestionsThe statement given below are the deficiency symptoms of a certain element. Identify the element with the help of options that follow.
I. Stunted growth
II. Tissue necrosis
III. Curling appear first in young leaves
IV. Premature flower abscission
Choose the correct option
magnesium
boron
calcium
nitrogen
Insectivorous plant is
Cuscuta
Drosera
Striga
None of the above
Hydroponics is
cultivation of plants in water
growth of plants towards water
growth of plants away from water
soil less cultivation of plants
Heterocysts in Anabaena is helpful in
secondary growth
nitrogen-fixation
ion uptake
gaseous exchange
A metal ion involved in stomatal regulation is :
iron
potassium
zinc
magnesium
Nodules with nitrogen-fixing bacteria are found in
cotton
gram
mustard
wheat
The nitrifying bacteria that convert the ammonia to nitrates are
Nitrosomonas and Nitrobacter
Azotobacter
Rhizobium sp.
Thiobacillus denitrificans
When one element is involved in opening and closing of stomata, the other helps to maintain the ribosome structure. They are
Potassium and calcium
Phosphorus and sulphur
Potassium and magnesium
Iron and magnesium
Iron and magnesium
Mycorrhiza is an example of
endoparasitism
decomposers
symbiotic relationship
ectoparasitism
The plant ash is an indication of :
organic matter of plant
waste product
mineral salts absorbed by plants
none of these
