In which organisms does growth occur continuously throughout their lifespan?

Which of the following structures show unlimited growth in plants?

Sleep movements in $Samanea \text{ } saman$ are regulated by

The maximum growth rate occurs in

The tip of a twiner is sensitive and coils around a support. This coiling is called:

When certain tomato plants are kept in a dark room for a few days,they develop an albinism-like color. What is this phenomenon called?