SOLUTION: Plant reproduction worksheet - Studypool - Free Printable

Let's go through the Plant Reproduction Worksheet step by step and solve each question with explanations.

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Holt Page 270 Flowers

1. Flowers are adaptations for ____________________________

✔ Answer: *Sexual reproduction*

🔹 Explanation: Flowers are reproductive structures in flowering plants (angiosperms). Their main function is to facilitate sexual reproduction by attracting pollinators and enabling pollen transfer between plants.

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2. (Read caption) The stamen produces the ____________ and the pistil produces the ____________

✔ Answer:
- Stamen produces the pollen
- Pistil produces the egg (or ovule)

🔹 Explanation:
- The stamen is the male part of the flower, consisting of anther (produces pollen) and filament.
- The pistil is the female part, made up of stigma, style, and ovary. Inside the ovary are ovules, which contain the egg cells.

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Holt Page 280–281 Reproduction of Flowering Plants

3. Circle any of the following statements that are NOT true.

a) Fertilization takes place within the flower
b) Flowers produce seeds
c) Flowers do not produce fruit

✔ Answer: Circle c) "Flowers do not produce fruit"

🔹 Explanation:
- a) True: Fertilization occurs inside the ovary of the flower.
- b) True: After fertilization, the ovules develop into seeds.
- c) False: While flowers themselves don’t *directly* produce fruit, they develop into fruits after fertilization. The ovary matures into the fruit. So saying “flowers do not produce fruit” is incorrect — they *do* lead to fruit formation.

So, circle statement c.

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4. Number the steps 1st, 2nd, and 3rd.

_______ Pollen lands on the stigma
_______ A sperm cell fuses with an egg in the ovule
_______ A pollen tube grows down through the style to the ovary

✔ Answer:

1. Pollen lands on the stigma
2. A pollen tube grows down through the style to the ovary
3. A sperm cell fuses with an egg in the ovule

🔹 Explanation: This sequence describes pollination and fertilization:
1. Pollination: Pollen reaches the stigma.
2. Germination: Pollen grain germinates and forms a pollen tube that travels down the style.
3. Fertilization: Sperm cells travel through the tube and fuse with the egg in the ovule.

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5. Mark as true or false. If false, correct the sentence.

a) ______ Each ovule contains an egg
→ ✔ True
(No correction needed)

b) ______ The pollen travels from anther to stigma
→ ✘ False
→ Correction: The pollen travels from stigma to ovary via the pollen tube.
But actually, the original statement says “from anther to stigma” — this is true for pollination, but not for movement *after* landing.

Wait! Let’s clarify:

- Pollen is produced in the anther and lands on the stigma → so "pollen travels from anther to stigma" is correct during pollination.
- But once it lands, it grows a tube down to the ovary.

So, b) is TRUE if we interpret it as the physical movement of pollen grains (via wind, insects, etc.) from anther to stigma.

✔ So:
b) True — no correction needed.

c) ______ The ovule becomes the fruit
→ ✘ False
→ Correction: The ovary becomes the fruit. The ovule becomes the seed.

d) ______ The ovary becomes the seed
→ ✘ False
→ Correction: The ovary becomes the fruit; the ovule becomes the seed.

✔ Final Answers:

| Letter | True/False | Correction |
|--------|------------|-----------|
| a) | True | – |
| b) | True | – |
| c) | False | The ovary becomes the fruit |
| d) | False | The ovule becomes the seed |

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Holt Page 288 What's So Great About Seeds?

6. What is the name of the form of an animal that is just starting to develop? (Hint: The animal versions all look similar due to common ancestry.)

✔ Answer: Embryo

🔹 Explanation: In both plants and animals, the early stage of development after fertilization is called the embryo. In animals, embryos develop in eggs or uteri; in plants, the embryo develops inside the seed.

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7. List the 3 parts of a seed:

✔ Answer:
1. Seed coat
2. Embryo
3. Food supply (cotyledons or endosperm)

🔹 Explanation:
- Seed coat: Protects the seed.
- Embryo: The young plant (with root, shoot, and leaves).
- Food supply: Stores nutrients for the growing embryo (either in cotyledons or endosperm).

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8. What nourishes the young plant as it just begins to grow/germinate?

✔ Answer: The stored food in the seed (endosperm or cotyledons)

🔹 Explanation: During germination, the seed uses its own stored energy (from endosperm or cotyledons) until the plant can produce its own food via photosynthesis.

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9. Read the "Environmental Science Connection" caption. Why do some seeds need to be eaten to grow?

✔ Answer:
Some seeds need to be eaten because animals digest them and pass them through their digestive system, which helps break down the seed coat and allows germination. Also, animals disperse the seeds to new locations, increasing chances of survival.

🔹 Explanation:
- The digestion process often softens the seed coat (scarification), making it easier for the embryo to emerge.
- Animals carry seeds far from the parent plant, reducing competition and spreading the species.
- Examples: Berries eaten by birds, whose seeds are excreted elsewhere.

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✔ Final Answer Summary:

#### Page 270
1. Sexual reproduction
2. Pollen, egg

#### Page 280–281
3. Circle: c) Flowers do not produce fruit
4.
1. Pollen lands on the stigma
2. A pollen tube grows down through the style to the ovary
3. A sperm cell fuses with an egg in the ovule
5.
a) True
b) True
c) False → The ovary becomes the fruit
d) False → The ovule becomes the seed

#### Page 288
6. Embryo
7. Seed coat, Embryo, Food supply
8. Stored food in the seed (endosperm or cotyledons)
9. Because digestion breaks down the seed coat and helps disperse the seed to new areas, aiding germination and spread.

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