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Science--Chapter 1A Plant Structure and Function

Chapter 1A Plant Structure and Function

 

1. How are plants grouped?

Plants can be classified into two large groups--plants that make seeds and plants that do not make seeds.

Flowering plants and conifers make seeds.

PLants that do not make seeds reproduce by making spores. Ferns and mosses do not make seeds.

2. What are the parts of a flower?

The four parts of a flower are sepal, petals, pistil, and stamens. Each part has a role in helping the flower make seeds.

Some flowers have fewer than four parts but can still make seeds.

3. How do flowers make seeds and fruits?

Pollination occurs when pollen from a stamen is moved to a pistil. Sperm in the pollen combines with an egg during fertilization to form a seed.

Fruits grow from the ovary of the pistil, and seeds form inside the fruit.

4. What is the life cycle of a flowering plant?

Seeds grow into plants when they have enough water, oxygen, and the right temperature.

The full-grown plant that produces seeds is the mature stage of a flowering plant's life cycle.

Vocabulary

Reproduce     to make more of the same kind

Classify           to sort  into groups based on similarities and differences

Conifer           a plant that makes seeds inside cones

Spore              a tiny cell that can grow into a new plant

Sepal               one of the leaflike parts that protects a flower bed and that is usually green

Pistil                part of a flower that makes the eggs that grow into seeds

Stamen           part of a flower that makes pollen

Pollen              tiny grains that make seeds when combined with a flower’s egg

Pollination      the movement of pollen from a stamen to a pistil

Ovary             the bottom part of the pistil in which seeds form

Ovule              the inner part of an ovary that contains an egg

Fertilization    the combination of sperm from a pollen grain with an egg to form a seed

Embryo          tiny part of a seed that can grow into a new plant

Monocot seed a seed that has one leaf and stored food outside the seed leaf

Dicot seed       a seed that has two seed leaves that contain stored food

Dormant         the resting stage of a seed

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