Stimulus in Organism's Environment

What is a stimulus in the context of an organism's environment?

• A response to an action

• A change that causes the organism to react

• A type of organism

• A scientific instrument

Tags

NGSS.MS-LS2-1

Which of the following is an example of an external stimulus?

• A giraffe feeling thirsty

• A lion taking a nap

• Feeling cold and putting on a jacket

• Running a fever due to an infection

What is an internal stimulus?

• A stimulus that comes from outside an organism

• A stimulus that comes from inside an organism

• A stimulus that does not affect the organism

• A stimulus that is always visible

Which of the following is NOT an example of an internal stimulus?

• Dehydration

• Pain

• A snake lunging at a rabbit

• Lack of energy

What is the response of an organism to a stimulus called?

• Tropism

• Homeostasis

• Effect

• Stimulus

Which of the following is an example of an internal stimulus?

• A squirrel sees a cat and runs up a tree

• You smell food and your mouth starts to water

• There is dust in the air, so you sneeze

• You have a stomachache and throw up

Tags

NGSS.MS-LS1-8

What type of tropism is exhibited when roots grow toward water?

• Phototropism

• Thigmotropism

• Geotropism

• Hydrotropism

What is the term for the maintenance of a stable internal environment in an organism?

• Response

• Tropism

• Homeostasis

• Regulation

Which type of tropism involves plants growing towards or away from light?

• Phototropism

• Thigmotropism

• Geotropism

• Hydrotropism

What term describes a change in conditions inside an organism?

• External

• Instinct

• Internal

• Tropism