Chapter 1: Reproduction of Plants PDF

# Unit 1: Continuation of Life ## 1 Reproduction of Plants ### 1 How do plants reproduce? 1. What stages of growth does a tomato plant go through? Write the correct answers on the lines. * Seeds * A seed sprouts * Roots, a stem and leaves grow * The plant grows taller * Flower grows * Flower wi...

# Unit 1: Continuation of Life ## 1 Reproduction of Plants ### 1 How do plants reproduce? 1. What stages of growth does a tomato plant go through? Write the correct answers on the lines. * Seeds * A seed sprouts * Roots, a stem and leaves grow * The plant grows taller * Flower grows * Flower wilts * Fruits grow 2. Which part of a tomato plant can grow into a new plant? A seed ### 3 What fruit seeds have you seen? Cut open some fruits and find their seeds. In which part of a fruit can you usually find seeds? * Skin * Flesh ### 4 Some plants can reproduce by different parts other than seeds. How can these plants reproduce? Circle the correct answers. 1. Violets can reproduce by their **roots / stems / leaves**. 2. Sweet potatoes can reproduce by their **roots / stems / leaves**. 3. Strawberries can reproduce by their **roots / stems / leaves**. **Note:** Fruits of flowering plants usually contain **seeds** that are used for reproduction. Some plants can also reproduce by **leaves**, **roots**, or **stems**. ## 2 What parts of a flower help the plant reproduce? 1. What are the different parts of this flower for? Write the correct answers on the lines. * **Stamen:** produces pollen * **Pistil:** receives pollen and the ovary grows into a fruit * **Sepal:** protects the unopened flower * **Petal:** attracts insects for pollination **Flowers can cause allergic reactions. Don't put your nose too close to them during observation. Do not handle flowers if you are allergic to pollen**. 2. Do these flowers have the same parts as the one above? * **China rose:** Yes * **Sunflower:** Yes **More to Explore:** Observe the flowers of different plants in your school or a park. What parts do the flowers have? ## 3 How does a flower grow into a fruit? Study these pictures and talk about how a flower grows into a fruit. * Pollen sticks to an insect. * The insect caries the pollen to another flower. * The flower which received the pollen wilts. * The ovary starts growing. * The ovary grows into a fruit. * Seeds in a fruit **Note:** Pollination is the transfer of pollen from a stamen to a **pistil**. After pollination, the ovary of the flower grows into a fruit, which contains **seed**. ## 4 How do plants spread their pollen? 1. What do flowers use to attract animals for pollination? Put a ✓ in the correct boxes. * ✓ Nectar * ✓ Sweet smells * Colourful petals * Fruits **Reading to Learn:** Read 'Tricks to Attract Insects' to learn how plants attract insects for pollination in different ways.* ## 2 How do these plants spread their pollen? 1. *Corn:* * Flowers of corn: Wind 2. *Willow:* * Flowers of willow: Wind **Note:** Flowering plants spread their pollen by **wind** or **animals**. ## 5 How do plants spread their seeds? 1. Plants spread their seeds for reproduction. How do these plants spread their seeds? Write the correct letters in the circles. (The letters can be used more than once.) * 1. (A) - Wind * 2. (D) - Animals * 3. (A) - Wind * 4. (D) - Animals * 5. (B) - Water 2. What features do these fruits or seeds have? How do the features help plants spread their seeds? * **1:** The seeds are small and light, which helps them to be carried by the wind. * **2:** The coconut has a hard outer shell that can float on water. This helps it to be carried to new places. * **3:** The dandelion seeds have parachutes that help them to be carried by the wind. * **4:** The burr has hooks that can stick to animal fur. This helps it to travel to new places. * **5:** The beans are enclosed in pods, which burst open and scatter the seeds over a wide area. ## Summary **Reproduction of plants:** Seeds in fruits can grow into new plants. As a seed sprouts, different parts of the plant, including roots, a stem, and leaves, start to grow. Flowers and fruits also grow on flowering plants. Some plants can reproduce by roots, stems, or leaves. **Flowers and Fruits:** A flower is usually made up of petals, sepals, a pistil, and stamens. The sepals protect an unopened flower, and the stamen produce pollen. When the pistil receives pollen, the flower wilts, and the ovary grows into a fruit. **Spreading Pollen:** Flowering plants reproduce by pollination. Some of them attract animals for pollination with nectar, sweet smells, or colorful petals. Some plants spread their pollen by wind. **Seeds:** Seeds are important for plant reproduction. Fruits and seeds of different plants have different features that help the plants spread their seeds by wind, water, bursting, or animals.