Biology · Textbook solutions

Plant Growth and Development

Every solved example, exercise, and miscellaneous question, in the order the textbook teaches them. · 21 questions

Exercises

21 q

Ex 13 Q1 $Define growth, differentiation, development, dedifferentiation, redifferentiation, determinate growth, meristem and growth rate.$
Ex 13 Q2 $Why is not any one parameter good enough to demonstrate growth throughout the life of a flowering plant?$
Describe briefly:
Ex 13 Q3 (a) $Arithmetic growth$
Ex 13 Q3 (b) $Geometric growth$
Ex 13 Q3 (c) $Sigmoid growth curve$
Ex 13 Q3 (d) $Absolute and relative growth rates$
Ex 13 Q4 $List five main groups of natural plant growth regulators. Write a note on discovery, physiological functions and agricultural/horticultural applications of any one of them.$
Ex 13 Q5 $Why is abscisic acid also known as stress hormone?$
Ex 13 Q6 $'Both growth and differentiation in higher plants are open'. Comment.$
Ex 13 Q7 $'Both a short day plant and a long day plant can produce can flower simultaneously in a given place'. Explain.$
Which one of the plant growth regulators would you use if you are asked to:
Ex 13 Q8 (a) $induce rooting in a twig$
Ex 13 Q8 (b) $quickly ripen a fruit$
Ex 13 Q8 (c) $delay leaf senescence$
Ex 13 Q8 (d) $induce growth in axillary buds$
Ex 13 Q8 (e) $'bolt' a rosette plant$
Ex 13 Q8 (f) $induce immediate stomatal closure in leaves.$
Ex 13 Q9 $Would a defoliated plant respond to photoperiodic cycle? Why?$
What would be expected to happen if:
Ex 13 Q10 (a) $\text{GA}_3$
Ex 13 Q10 (b) $dividing cells stop differentiating$
Ex 13 Q10 (c) $a rotten fruit gets mixed with unripe fruits$
Ex 13 Q10 (d) $you forget to add cytokinin to the culture medium.$