Characteristics of life worksheet: Fill out & sign online | DocHub - Free Printable
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Step-by-step solution for: Characteristics of life worksheet: Fill out & sign online | DocHub
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Show Answer Key & Explanations
Step-by-step solution for: Characteristics of life worksheet: Fill out & sign online | DocHub
Here is the completed worksheet with each statement matched to the correct characteristic(s) of living things. I’ll explain each answer clearly.
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1. An amoeba is a unicellular organism.
✔ A. All living things contain cells.
*Explanation:* Even though it’s only one cell, an amoeba is still made of a cell — which supports the idea that all living things are composed of cells (the basic unit of life).
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2. When a human steps out into the cold air, the body begins to shiver in order to keep its temperature at 98.6 degrees Fahrenheit.
✔ F. All living things maintain an internal balance. *(Homeostasis)*
*Explanation:* Shivering generates heat to maintain a stable internal body temperature — a classic example of homeostasis.
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3. Green plants produce their own food through the process of photosynthesis.
✔ C. All living things obtain and use energy.
*Explanation:* Photosynthesis allows plants to convert sunlight into chemical energy (glucose), which they use for growth and metabolism.
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4. An adult hydra is producing its offspring through budding.
✔ D. All living things reproduce.
*Explanation:* Budding is a form of asexual reproduction — the hydra is creating new individuals, fulfilling the characteristic of reproduction.
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5. The roots of a plant grow towards a source of ground water.
✔ E. All living things respond to stimuli.
*Explanation:* Roots detecting and growing toward water is a response to an environmental stimulus (water gradient).
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6. Over three years, Tim’s height has increased from 5’4” to 5’11”.
✔ G. All living things grow and develop.
*Explanation:* Height increase over time is physical growth — a key sign of development in living organisms.
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7. A pill bug eats a carrot.
✔ C. All living things obtain and use energy.
*Explanation:* Eating food (like a carrot) provides energy and nutrients needed for survival and activity.
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8. A baby songbird hatches from its egg with both parent songbirds watching.
✔ D. All living things reproduce. *(Also implies G – growth/development)*
*Explanation:* Hatching is part of the reproductive cycle. The egg was produced by parents, and the hatchling will now grow and develop. So D is primary, but G also applies.
> *Note: Since directions say “some may be used more than once,” we can assign multiple if appropriate. But for strict matching, D is most direct.*
✔ Best single match: D
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9. A tulip opens up in the morning at sunrise and closes up in the evening at sunset.
✔ E. All living things respond to stimuli.
*Explanation:* The tulip responds to light (sunrise/sunset) — this is photoperiodism or nastic movement, a response to environmental cues.
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10. Identical twins have 99.999% of the same genes.
✔ B. All living things contain DNA.
*Explanation:* Genes are made of DNA. The fact that twins share nearly identical DNA highlights that DNA is the genetic material in living things.
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11. A caterpillar hibernates in a cocoon, and emerges as a butterfly.
✔ G. All living things grow and develop.
*Explanation:* Metamorphosis from caterpillar to butterfly is a dramatic developmental change — growth and transformation over time.
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12. It is thought that humans and chimpanzees once shared a common ancestor.
✔ H. All living things evolve as a population.
*Explanation:* Evolution explains how species change over time and share common ancestors — this is evidence of evolutionary descent.
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13. A beaver is an organism composed of many different types of cells.
✔ A. All living things contain cells.
*Explanation:* Even complex organisms like beavers are made of cells — this reinforces the cell theory.
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14. A sea worm drops its tail and the tail becomes a new worm.
✔ D. All living things reproduce. *(Also G – growth/development)*
*Explanation:* This is regeneration and asexual reproduction — the tail grows into a whole new individual. So D is best fit.
✔ Best single match: D
---
15. As a sea worm is placed in fresh water, the pulse slows down in order for the worm to conserve energy.
✔ F. All living things maintain an internal balance. *(Homeostasis)*
*Explanation:* Adjusting heart rate (pulse) to conserve energy in a new environment shows regulation to maintain internal stability.
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## ✔ Final Answer Key:
1. A
2. F
3. C
4. D
5. E
6. G
7. C
8. D *(also G, but D is primary)*
9. E
10. B
11. G
12. H
13. A
14. D
15. F
---
Let me know if you’d like this formatted as a printable answer sheet or need visuals!
---
1. An amoeba is a unicellular organism.
✔ A. All living things contain cells.
*Explanation:* Even though it’s only one cell, an amoeba is still made of a cell — which supports the idea that all living things are composed of cells (the basic unit of life).
---
2. When a human steps out into the cold air, the body begins to shiver in order to keep its temperature at 98.6 degrees Fahrenheit.
✔ F. All living things maintain an internal balance. *(Homeostasis)*
*Explanation:* Shivering generates heat to maintain a stable internal body temperature — a classic example of homeostasis.
---
3. Green plants produce their own food through the process of photosynthesis.
✔ C. All living things obtain and use energy.
*Explanation:* Photosynthesis allows plants to convert sunlight into chemical energy (glucose), which they use for growth and metabolism.
---
4. An adult hydra is producing its offspring through budding.
✔ D. All living things reproduce.
*Explanation:* Budding is a form of asexual reproduction — the hydra is creating new individuals, fulfilling the characteristic of reproduction.
---
5. The roots of a plant grow towards a source of ground water.
✔ E. All living things respond to stimuli.
*Explanation:* Roots detecting and growing toward water is a response to an environmental stimulus (water gradient).
---
6. Over three years, Tim’s height has increased from 5’4” to 5’11”.
✔ G. All living things grow and develop.
*Explanation:* Height increase over time is physical growth — a key sign of development in living organisms.
---
7. A pill bug eats a carrot.
✔ C. All living things obtain and use energy.
*Explanation:* Eating food (like a carrot) provides energy and nutrients needed for survival and activity.
---
8. A baby songbird hatches from its egg with both parent songbirds watching.
✔ D. All living things reproduce. *(Also implies G – growth/development)*
*Explanation:* Hatching is part of the reproductive cycle. The egg was produced by parents, and the hatchling will now grow and develop. So D is primary, but G also applies.
> *Note: Since directions say “some may be used more than once,” we can assign multiple if appropriate. But for strict matching, D is most direct.*
✔ Best single match: D
---
9. A tulip opens up in the morning at sunrise and closes up in the evening at sunset.
✔ E. All living things respond to stimuli.
*Explanation:* The tulip responds to light (sunrise/sunset) — this is photoperiodism or nastic movement, a response to environmental cues.
---
10. Identical twins have 99.999% of the same genes.
✔ B. All living things contain DNA.
*Explanation:* Genes are made of DNA. The fact that twins share nearly identical DNA highlights that DNA is the genetic material in living things.
---
11. A caterpillar hibernates in a cocoon, and emerges as a butterfly.
✔ G. All living things grow and develop.
*Explanation:* Metamorphosis from caterpillar to butterfly is a dramatic developmental change — growth and transformation over time.
---
12. It is thought that humans and chimpanzees once shared a common ancestor.
✔ H. All living things evolve as a population.
*Explanation:* Evolution explains how species change over time and share common ancestors — this is evidence of evolutionary descent.
---
13. A beaver is an organism composed of many different types of cells.
✔ A. All living things contain cells.
*Explanation:* Even complex organisms like beavers are made of cells — this reinforces the cell theory.
---
14. A sea worm drops its tail and the tail becomes a new worm.
✔ D. All living things reproduce. *(Also G – growth/development)*
*Explanation:* This is regeneration and asexual reproduction — the tail grows into a whole new individual. So D is best fit.
✔ Best single match: D
---
15. As a sea worm is placed in fresh water, the pulse slows down in order for the worm to conserve energy.
✔ F. All living things maintain an internal balance. *(Homeostasis)*
*Explanation:* Adjusting heart rate (pulse) to conserve energy in a new environment shows regulation to maintain internal stability.
---
## ✔ Final Answer Key:
1. A
2. F
3. C
4. D
5. E
6. G
7. C
8. D *(also G, but D is primary)*
9. E
10. B
11. G
12. H
13. A
14. D
15. F
---
Let me know if you’d like this formatted as a printable answer sheet or need visuals!
Parent Tip: Review the logic above to help your child master the concept of characteristics of living things worksheet middle school.
