Why do tendrils show a coiled growth pattern?

The number of mitochondria increases in cells of

Intussusception is

Generally,the internode of a plant elongates most in:

In which organisms does growth occur continuously throughout their lifespan?

Which of the following four phases, in the post-emergence life of an angiospermic plant, begins just after the germination of the seed and ends when the plant develops the capacity to reproduce?