Rhizobium lives symbiotically with root nodules and fixes atmospheric nitrogen. It gives nitrogenous compound to host and inturn takes food from host. This food taken by bacterium is
Fats
Proteins
Carbohydrates
Any of these
Which of the following pairs of family's posses pollinia?
Parachute mechanism of seed dispersal occurs in
$1/3$ spiral phyllotaxy $(called\,\, Tristichous)$ means
A disc like reduced stem is found in
Aril helps in