$A$ dark-grown,pale,and undifferentiated seedling is called:

Study the following statements:
$I.$ $O_2$ helps in releasing metabolic energy,which is essential for growth.
$II.$ Nutrients are required by plants for the synthesis of protoplasm.
$III.$ Change in temperature could be detrimental for the survival of an organism.
$IV.$ Light and gravity do not affect the stages of growth.
Choose the correct option.

$A$ rubber band stretches and reverts back to its original position. Bubble gum stretches,but it would not return to its original position. Is there any difference between the two processes? Discuss it with respect to plant growth. [Hint: Elasticity (reversible),Plasticity (irreversible)]

$I.$ Increased vacuolation
$II.$ Cell enlargement
$III.$ New cell wall deposition
Which of the above are the characteristics of the phase of elongation?
Choose the correct option accordingly.

What is the approximate height of the tallest tree, $Sequoia$ $sempervirens$ (in $m$)?

Which process is essential for the growth of an organism?