Sensitivity in plants: tropism

Any change in an organisms environment that causes a response is...

• tropism

• photosynthesis

• cellular respiration

• stimuli

Positive tropism is movement...

• away from stimuli

• towards stimuli

Negative tropism is movement...

• away from stimuli

• towards stimuli

A plant growing in search for sunlight is an example of:

• thigmotropism

• phototropism

• gravitropism

The roots of a plant growing downwards is an example of:

• positive thigmotropism

• negative thigmotropism

• positive geotropism

• negative geotropism

The stem of a plant growing up is an example of:

• positive thigmotropism

• negative thigmotropism

• positive geotropism

• negative geotropism

Poison ivy growing in a wall is an example of:

• gravitropism

• geotropism

• thigmotropism

• geotropism

Internal stimuli are chemicals, called _________ that a plant produces.

• light

• temperature

• tough

• hormones

The hormone responsible for regulating growth in plants is called:

• adrenaline

• glycogen

• auxine

• growth factor