Question
This video shows a hydra—a microscopic animal found in freshwater lakes and ponds. After watching the video, identify three characteristics of the hydra.
Tentacles
Large eyes
Tube-like body
Ability to move
Color-changing skin
2
At the base of the hydra, there is a sticky disc that attaches to rocks and other surfaces. How might this help the hydra survive?
A
It can be used as a weapon against predators
B
It produces a strong smell that keeps prey away
C
It helps the hydra stay in place to catch passing prey
D
It allows the hydra to move from place to place to find food
3
This hydra has three parts: a central column and two “buds” growing on either side. How do the hydra’s buds compare to the rest of its body?
A
The buds have longer tentacles than the body
B
The buds look like smaller versions of the body
C
The buds are hollow while the rest of the body is solid
D
The buds are covered in a protective shell but the body is not
4
Over time, the buds will break away and form new, independent hydras. Use this information to complete the sentence below. Not all answer choices will be used.
In this example, when both buds break away, there will be
hydras instead of one.
zero
two
three
5
In the video, one of the buds is older than the other. Which bud do you think is older and almost ready to break away? What makes you think that?
Tentacles
Large eyes
Tube-like body
Ability to move
Color-changing skin
2
At the base of the hydra, there is a sticky disc that attaches to rocks and other surfaces. How might this help the hydra survive?
A
It can be used as a weapon against predators
B
It produces a strong smell that keeps prey away
C
It helps the hydra stay in place to catch passing prey
D
It allows the hydra to move from place to place to find food
3
This hydra has three parts: a central column and two “buds” growing on either side. How do the hydra’s buds compare to the rest of its body?
A
The buds have longer tentacles than the body
B
The buds look like smaller versions of the body
C
The buds are hollow while the rest of the body is solid
D
The buds are covered in a protective shell but the body is not
4
Over time, the buds will break away and form new, independent hydras. Use this information to complete the sentence below. Not all answer choices will be used.
In this example, when both buds break away, there will be
hydras instead of one.
zero
two
three
5
In the video, one of the buds is older than the other. Which bud do you think is older and almost ready to break away? What makes you think that?
Answers
GPT-4o mini
1. Three characteristics of the hydra are:
- Tentacles
- Tube-like body
- Ability to move
2. The sticky disc at the base of the hydra helps it survive by:
**C**: It helps the hydra stay in place to catch passing prey.
3. The hydra’s buds compare to the rest of its body by:
**B**: The buds look like smaller versions of the body.
4. In this example, when both buds break away, there will be **two** hydras instead of one.
5. In the video, the older bud is likely the one that appears larger or more developed compared to the other. This suggests that it has been growing for a longer period and is closer to being ready to break away and form an independent hydra. The visual difference in size and maturity indicates that it is nearing the point of independence.
- Tentacles
- Tube-like body
- Ability to move
2. The sticky disc at the base of the hydra helps it survive by:
**C**: It helps the hydra stay in place to catch passing prey.
3. The hydra’s buds compare to the rest of its body by:
**B**: The buds look like smaller versions of the body.
4. In this example, when both buds break away, there will be **two** hydras instead of one.
5. In the video, the older bud is likely the one that appears larger or more developed compared to the other. This suggests that it has been growing for a longer period and is closer to being ready to break away and form an independent hydra. The visual difference in size and maturity indicates that it is nearing the point of independence.