In which of the following is thigmotropic movement best observed?

Example of positive geotropism is

Which of the following processes is not associated with growth?

In geometrical growth,the log phase is represented by:

The growth period of a plant is generally divided into how many phases?

Identify the correct and incorrect statements from the following.
$(i)$ $17,500$ new cells are produced per hour by a single maize root apical meristem.
$(ii)$ With the help of length,growth of pollen tube is measured.
$(iii)$ The growth of the leaf is measured in terms of volume.
$(iv)$ Cells in a watermelon may increase in size by up to $3,50,000$ times.