Which is essential for the growth of root tip?

Phytochrome is a

You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots?

A few drops of sap were collected by cutting across a plant stem by a suitable method. The sap was tested chemically. Which one of the following test results indicates that it is phloem sap?

Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteins?

During cell growth, DNA synthesis takes place in