Identify $A$ to $E$ in the following diagram
What is correct for parthenium (Carrot grass)?
$(a)$ It came into India as a contaminant with imported wheat
$(b)$ It causes allergy
$(c)$ Asexual reproduction occurs in its flower
Identify $A$ and $B$ in diagram given below:
The pollen grain is
Microspore tetrads forms due to meiotic division occurs in......