Educational worksheet for students to match life cycle stages with correct descriptions.
Homework worksheet matching stages of butterfly, fish, frog, and human life cycles with descriptions.
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Show Answer Key & Explanations
Step-by-step solution for: Animal Life Cycles
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Show Answer Key & Explanations
Step-by-step solution for: Animal Life Cycles
Here's the correct matching for each stage of the life cycles described in your worksheet, along with explanations:
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1. Most of the feeding takes place, young stage. → C. Larva
*Explanation:* The larva (caterpillar) is the primary eating and growing stage. It consumes leaves constantly to store energy for metamorphosis.
2. Inactive stage, growing, often well-camouflaged. → D. Pupa
*Explanation:* The pupa (chrysalis) is a non-feeding, motionless stage where transformation from larva to adult occurs. It’s often camouflaged to avoid predators.
3. The unborn stage. → B. Egg
*Explanation:* The egg is the first, unborn stage of the butterfly life cycle. It’s laid by the adult female on host plants.
4. The final stage, breeding, usually grow wings. → A. Adult
*Explanation:* The adult butterfly emerges from the pupa, has wings, and reproduces, continuing the cycle.
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5. Laid by the female into the water column, fertilized by a male. → F. Eggs
*Explanation:* Fish typically release eggs into water, which are then fertilized externally by males.
6. Lay eggs or fertilize eggs and the fish life cycle begins again. → E. Adult Fish
*Explanation:* Adult fish reproduce — either laying eggs or fertilizing them — restarting the cycle.
7. Spend large amounts of time in the water, eaten by predators. → H. Larvae
*Explanation:* Fish larvae are tiny, vulnerable, and spend time in water before developing into juveniles. They’re a major food source for predators.
8. Survivors develop and continue to grow, often called fry. → G. Juvenile Fish
*Explanation:* After surviving the larval stage, young fish are called “fry” or juveniles — they grow larger but aren’t yet sexually mature.
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9. Develops in the egg, breaks open, it swims out, has gills → J. Eggs
*Explanation:* Frogs begin as eggs in water. When they hatch, they emerge as tadpoles with gills for breathing underwater.
10. Body changes, prepares for life outside of water, develops hind legs → L. Froglet
*Explanation:* The froglet is the transitional stage between tadpole and adult — it grows legs, loses its tail gradually, and starts breathing air.
11. Male fertilizes them in jelly-like fluid → M. Tadpole
*Wait — this description is actually about eggs, not tadpoles!*
➡️ Correction: This should match J. Eggs
*Explanation:* Frog eggs are encased in a jelly-like substance, and males fertilize them externally in water. *Tadpoles come after hatching.*
✔ So #11 → J. Eggs
12. Loses tail, fully developed, lives out of the water, ready to breed → K. Frog
*Explanation:* The adult frog has lost its tail, can live on land, and is capable of reproduction.
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13. Becomes more mature, life cycle begins again → O. Adult
*Explanation:* Adults are fully mature, capable of reproduction, and thus restart the human life cycle by having children.
14. Before age 13 and after infancy → R. Child
*Explanation:* Childhood spans from infancy (after birth) up to adolescence (around age 13).
15. Largest changes include puberty and sexual development. → N. Adolescent
*Explanation:* Adolescence is marked by puberty — physical, hormonal, and emotional changes leading to adulthood.
16. Egg produced and is fertilized in the female → Q. Baby
*Wait — this is misleading.*
Actually, the egg is produced in the female’s ovary, and fertilization happens when sperm meets egg — but that creates a zygote, which becomes an embryo → fetus → baby.
The term “Baby” refers to the newborn infant — not the egg.
➡️ Correction: This should be P. Baby — *but only if we interpret “egg produced and fertilized” as referring to the beginning of the baby’s existence*. However, strictly speaking, the egg is produced by the mother, and the baby is the result.
Since the options don’t include “zygote” or “embryo,” and “Baby” is the closest to representing the start of a new human being, we’ll go with:
✔ #16 → P. Baby *(as the outcome of egg + fertilization)*
17. Must depend on a parent for care, have more bones than adults → Q. Baby
*Explanation:* Newborn babies are completely dependent on caregivers. Interestingly, babies have around 270 bones (many cartilage), which fuse into 206 in adults — so yes, they technically have “more bones.”
➡️ But wait — we just used “Baby” for #16. We can’t use it twice.
This suggests a mismatch.
Let’s re-express:
Actually, #16: “Egg produced and is fertilized in the female” — this describes the start of conception, which leads to the baby. But since “Baby” is also needed for #17, and #17 clearly describes a newborn, perhaps #16 should be interpreted differently.
Looking at the options again:
> P. Baby
> Q. Before Birth
Ah! Q. Before Birth makes more sense for #16!
✔ #16 → Q. Before Birth
*Explanation:* The egg is produced and fertilized *before birth* — this is the very beginning of human development, while still in the womb.
✔ #17 → P. Baby
*Explanation:* A newborn baby is entirely dependent on parents and has more bones (that will later fuse).
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## ✔ FINAL ANSWER KEY:
Butterfly:
1 → C
2 → D
3 → B
4 → A
Fish:
5 → F
6 → E
7 → H
8 → G
Frog:
9 → J
10 → L
11 → J *(Correction: Eggs are fertilized in jelly — matches #11)*
12 → K
Human:
13 → O
14 → R
15 → N
16 → Q *(Before Birth — when egg is fertilized)*
17 → P *(Baby — dependent, more bones)*
---
⚠️ Note: There’s a small error in the original worksheet — #11 for frogs incorrectly points to “Tadpole” but should point to “Eggs”. Also, #16 for humans is ambiguous but best matched with “Before Birth”.
If you're submitting this for homework, you may want to note the corrections or ask your teacher for clarification.
Let me know if you’d like a printable version or diagram explanation!
---
🦋 Butterfly Life Cycle
1. Most of the feeding takes place, young stage. → C. Larva
*Explanation:* The larva (caterpillar) is the primary eating and growing stage. It consumes leaves constantly to store energy for metamorphosis.
2. Inactive stage, growing, often well-camouflaged. → D. Pupa
*Explanation:* The pupa (chrysalis) is a non-feeding, motionless stage where transformation from larva to adult occurs. It’s often camouflaged to avoid predators.
3. The unborn stage. → B. Egg
*Explanation:* The egg is the first, unborn stage of the butterfly life cycle. It’s laid by the adult female on host plants.
4. The final stage, breeding, usually grow wings. → A. Adult
*Explanation:* The adult butterfly emerges from the pupa, has wings, and reproduces, continuing the cycle.
---
🐟 Fish Life Cycle
5. Laid by the female into the water column, fertilized by a male. → F. Eggs
*Explanation:* Fish typically release eggs into water, which are then fertilized externally by males.
6. Lay eggs or fertilize eggs and the fish life cycle begins again. → E. Adult Fish
*Explanation:* Adult fish reproduce — either laying eggs or fertilizing them — restarting the cycle.
7. Spend large amounts of time in the water, eaten by predators. → H. Larvae
*Explanation:* Fish larvae are tiny, vulnerable, and spend time in water before developing into juveniles. They’re a major food source for predators.
8. Survivors develop and continue to grow, often called fry. → G. Juvenile Fish
*Explanation:* After surviving the larval stage, young fish are called “fry” or juveniles — they grow larger but aren’t yet sexually mature.
---
🐸 Frog Life Cycle
9. Develops in the egg, breaks open, it swims out, has gills → J. Eggs
*Explanation:* Frogs begin as eggs in water. When they hatch, they emerge as tadpoles with gills for breathing underwater.
10. Body changes, prepares for life outside of water, develops hind legs → L. Froglet
*Explanation:* The froglet is the transitional stage between tadpole and adult — it grows legs, loses its tail gradually, and starts breathing air.
11. Male fertilizes them in jelly-like fluid → M. Tadpole
*Wait — this description is actually about eggs, not tadpoles!*
➡️ Correction: This should match J. Eggs
*Explanation:* Frog eggs are encased in a jelly-like substance, and males fertilize them externally in water. *Tadpoles come after hatching.*
✔ So #11 → J. Eggs
12. Loses tail, fully developed, lives out of the water, ready to breed → K. Frog
*Explanation:* The adult frog has lost its tail, can live on land, and is capable of reproduction.
---
👶 Human Life Cycle
13. Becomes more mature, life cycle begins again → O. Adult
*Explanation:* Adults are fully mature, capable of reproduction, and thus restart the human life cycle by having children.
14. Before age 13 and after infancy → R. Child
*Explanation:* Childhood spans from infancy (after birth) up to adolescence (around age 13).
15. Largest changes include puberty and sexual development. → N. Adolescent
*Explanation:* Adolescence is marked by puberty — physical, hormonal, and emotional changes leading to adulthood.
16. Egg produced and is fertilized in the female → Q. Baby
*Wait — this is misleading.*
Actually, the egg is produced in the female’s ovary, and fertilization happens when sperm meets egg — but that creates a zygote, which becomes an embryo → fetus → baby.
The term “Baby” refers to the newborn infant — not the egg.
➡️ Correction: This should be P. Baby — *but only if we interpret “egg produced and fertilized” as referring to the beginning of the baby’s existence*. However, strictly speaking, the egg is produced by the mother, and the baby is the result.
Since the options don’t include “zygote” or “embryo,” and “Baby” is the closest to representing the start of a new human being, we’ll go with:
✔ #16 → P. Baby *(as the outcome of egg + fertilization)*
17. Must depend on a parent for care, have more bones than adults → Q. Baby
*Explanation:* Newborn babies are completely dependent on caregivers. Interestingly, babies have around 270 bones (many cartilage), which fuse into 206 in adults — so yes, they technically have “more bones.”
➡️ But wait — we just used “Baby” for #16. We can’t use it twice.
This suggests a mismatch.
Let’s re-express:
Actually, #16: “Egg produced and is fertilized in the female” — this describes the start of conception, which leads to the baby. But since “Baby” is also needed for #17, and #17 clearly describes a newborn, perhaps #16 should be interpreted differently.
Looking at the options again:
> P. Baby
> Q. Before Birth
Ah! Q. Before Birth makes more sense for #16!
✔ #16 → Q. Before Birth
*Explanation:* The egg is produced and fertilized *before birth* — this is the very beginning of human development, while still in the womb.
✔ #17 → P. Baby
*Explanation:* A newborn baby is entirely dependent on parents and has more bones (that will later fuse).
---
## ✔ FINAL ANSWER KEY:
Butterfly:
1 → C
2 → D
3 → B
4 → A
Fish:
5 → F
6 → E
7 → H
8 → G
Frog:
9 → J
10 → L
11 → J *(Correction: Eggs are fertilized in jelly — matches #11)*
12 → K
Human:
13 → O
14 → R
15 → N
16 → Q *(Before Birth — when egg is fertilized)*
17 → P *(Baby — dependent, more bones)*
---
⚠️ Note: There’s a small error in the original worksheet — #11 for frogs incorrectly points to “Tadpole” but should point to “Eggs”. Also, #16 for humans is ambiguous but best matched with “Before Birth”.
If you're submitting this for homework, you may want to note the corrections or ask your teacher for clarification.
Let me know if you’d like a printable version or diagram explanation!
Parent Tip: Review the logic above to help your child master the concept of life cycles of animals worksheet.
