The sugarcane plant has

$A$ student was given a description of a flower: bisexual, actinomorphic, pentamerous, gamosepalous, gamopetalous, with $5$ stamens in epipetalous condition, and a bicarpellary, syncarpous, superior ovary. Which of the following is the correct floral formula for this flower?

How many series does the sub-class Gamopetalae contain?

In syngynia,the flowers are

Which one of the following is odd?

Vertical transmission of mycoplasmal diseases in plants may occur through which of the following?