Plant Hormones and Tropisms

Response to a stimulus in plants is called ________.

• touch

• gravity

• light

• tropism

A __________ is something that evokes a response.

• stimulus

• response

• tropism

Tags

NGSS.MS-LS1-8

The growth of shoots and roots is controlled by a group of hormones called _________.

• auxins

• ethylene

• stimulus

• tropism

Roots growing down into the earth is an example of ___________.

• positive phototropism

• positive geotropism

• positive thigmotropism

• negative geotropism

Shoots, stems, and leaves growing up away from the earth is an example of __________.

• negative geotropism

• positive geotropism

• positive thigmotropism

• negative thigmotropism

Tags

NGSS.MS-LS1-5

A growth movement away from a stimulus is called _________.

• positive tropism

• negative hydrotropism

• negative tropism

• positive phototropism

Which of the following is not a stimulus that plants respond to?

• touch

• light

• wind

• earth/gravity

Roots growing away from sunlight is an example of ______________.

• negative phototropism

• positive phototropism

• positive geotropism

• negative thigmotropism

Hormones are ________________.

• tissues

• chemical messengers

• cells that carry oxygen

• molecules in the air

Which hormone allows plants to perform phototropism?

• cytokinins

• ethylene

• gibberellins

• auxins