1. What is an example of an animal responding to its environment?
Killdeer video
What is the female killdeer’s response to the man moving closer to her nest?
________________________________________________
baby bird video (time period 1:25-1:45)
The baby birds reach up and open their mouths, what was the stimulus?
®2015 Generation Science

2. Do non-animals respond to their environment?
1. Plants are sensitive to several stimuli
video: Venus Fly Trap (time period .21 to 1.31)
Venus Fly Trap: What are the stimulus and the response that allow the plant to capture a fly?
Stimulus? ________________________________________
Response? _____________________________________
®2015 Generation Science

3. _____________________________________
video: Radish seedlings time lapse
(time period .25 to the end)
Radish seedlings:
What is the response of the seedlings to the sunlight coming through the window?
_____________________________________
®2015 Generation Science

4. 2. Single-celled amoebas (a type of protist) respond to touch.
Video: amoeba and a paramecium (time period beginning to .33)
The amoeba extends its pseudopods. What was the stimulus?
____________________________________________________________________________________________
®2015 Generation Science

5. Fungi response to being in the presence of a food source.
Video
What was the stimuli that caused the fungal spore to exude a glue-like substance?
_____________________________________________
What is the response of the fungal spore in the presence of water?
®2015 Generation Science

6. What is your response to certain stimuli?
Stimulus: cold air; your body’s response?
Stimulus: hot air; your body’s response?
Stimulus: pepper gets in your nose; your body’s response?
®2015 Generation Science

7. Human Body’s Response to…
Homeostasis
- an organism’s ability to keep conditions inside its body stable even when conditions in their surroundings change.
Create a T-chart like the one below. As you watch the video, record the body’s reactions to a cold environment and a warm environment.
Human Body’s Response to…
Cold Environment
Warm Environment

8. Does homeostasis occur in plants? Video
1. What is the stimulus that causes veins in deciduous leaves to close up and therefore stop producing chlorophyll?
Answer: _______________________________________
2. What is the stimulus that causes the tree to drop the leaves?
Answer: ______________________________________________
3. How is this an example of homeostasis? Meaning, what internal condition is the plant preserving by dropping leaves?
______________________________________________________