Question

A spike of unisexual flower is found in
tulip/onion/ rose/wheat?​

Answer 1

Catkin is a pendulous spike in leaf axis which bears unisexual flowers. It is a type of racemose inflorescence. Example: mulberry.

So, the correct answer is 'Mulberry'.

Answer 2

Answer:

catkin or ament is a slim, cylindrical flower cluster (a spike), with inconspicuous or no petals, usually wind-pollinated (anemophilous) but sometimes insect-pollinated (as in Salix). They contain many, usually unisexual flowers, arranged closely along a central stem that is often drooping. They are found in many plant families,