Mention the name of the internal factors that control development in plants.

Name the plant in which dimorphic leaves are found.

What happens if the meristematic cells ever cease to divide?

A farmer is using a substance called 2,4-D in his field growing wheat crop. Mention the purpose of using this substance in the field

A student cultures a callus from the tobacco pith in a sterilised minimal nutritive medium, but adds more cytokinins than auxins. What would develop first from the callus the shoot buds or the roots?

In a slide showing different types of cells, can you identify which type of the cell may be meristematic and the one which is incapable of dividing and how?

The rice seedlings infected with fungus Gibberella fujikuroi is called foolish seedlings ? What was the reason behind it?

Explain, how is it possible that a short-day plant and a long-day plant growing in the same location could flower on the same day of the year.

Light plays an important role in the life of all organisms. Name any three physiological processes in plants which are affected by light.

Which among the following is a long day plant-sugarbeet, sugarcane, tomato? Why is it so called?

Why is not that only one parameter is good enough to demonstrate growth throughout the life of flowering plants?

Both animals and plants grow. Why do we say that growth and differentiation in plants is open and not so in animals? Does this statement hold true for sponges also?

List five main groups of natural plant growth regulators. Write a note on discovery, physiological functions and agricultural/horticultural applications of any one of them.

What is the difference between florigen and other plant growth hormones?

Nicotiana tobacum,(tobacco) a short-day plant, when exposed to more than the critical period of light fails to flower. Explain.

Mention the factors which prove that phytohormones act synergistically or antagonistically.

Mention the phenomenon of growth in plants. Explain the phases of growth in detail.

Define growth, differentiation, development, dedifferentiation, redifferentiation, determinate growth, meristem and growth rate.

Describe briefly:
(a) Arithmetic growth
(b) Geometric growth
(c) Sigmoid growth curve
(d) Absolute and relative growth rates