Stimulus
What is a stimulus?
Change in internal or external conditions.
What is Geotropism?
Response to gravity.
What is Phototropism?
Plants response to light.
What is Thigmotropism?
Response to touch.
Whta is an element?
A pure substance composed of the same atom throughout.
How many types of stimulus are there?
2- Internal and external
What is an example of Geotropism?
Roots growing towards the ground.
If there was only a small window in a room, and the rest was dark, where would a plant grow?
Towards the light.
How does Thigmotropism affect plant growth?
It causes plants to wrap around objects
What is a compound?
A pure substance composed of 2 or more elements chemically combined.
What is an example of stimulus?
An animal is hot.
Why do petals grow upwards?
Because the petals grow towards the sun and against gravity.
Is Phototromism Internal or External?
External.
What is another way that Thigmotropism affects plant growth?
Some plants close their leaves/petals when touched.
How do you tell whether it is a element or a compound?
If there are more than 1 elements
What is a negative stimulus?
Stems growing away from gravity.
Is Geotropism an Internal or external stimulus?
External
How does Phototropism affect plant growth?
It helps enhance Photosynthesis.
Why do plants close up their leaves?
It's a defense mechanism that is used to protect from threats.
Is this an element or a compound?
NaCl
If a plant was potted on a wall, sideways, in what direction would the plants roots grow?
Downword.
Why do plants grow towards light?
Phototropism
What is Hydrotropism?
Plants response to water.
Is this an element or a compound?
K