Growth from apical meristems is known as primary growth, which encompasses all elongation.

https://en.wikipedia.org/wiki/Root

In some plants (such as ivy), the "root" actually clings to walls and structures.

https://en.wikipedia.org/wiki/Root

Gravitropism, the growth mechanism of plants that also causes the shoot to grow upward.

https://en.wikipedia.org/wiki/Root

At germination, roots grow downward.

https://en.wikipedia.org/wiki/Root

Over time, given the right conditions, roots can crack foundations, snap water lines, and lift sidewalks.

https://en.wikipedia.org/wiki/Root

Plant roots will generally grow in any direction where the correct environment of air, mineral nutrients and water exists to meet the plant's needs.

https://en.wikipedia.org/wiki/Root

There is correlation of roots using the process of plant perception to sense their physical environment to grow, including the sensory of light, and physical barriers.

https://en.wikipedia.org/wiki/Root