The type of growth pattern observed in conifers is

Which of the following instruments can be used to record plant growth by seconds,i.e.,in a fraction of a minute?

What is a $Phytotron$?

Which of the following movements is induced by injury?

In $......$,growth occurs throughout life,whereas in $......$,growth is observed only up to a certain age.

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