Chapter 3

Life Cycles

Lesson 1: Plant Life Cycles

Key Vocabulary

1. embryo-

A plant or animal in the early stages of development

2. germinate-to begin growing a new plant

3. life cycle-a series of stages that occur during the lifetime of a living thing

4. life span-the length of time it takes for an individual organism to complete its life cycle

Notes1. The ___________ of the flower makes pollen

which is needed to form ___________.

2. 3 ways pollen can be moved from the __________ to the __________:

a) Windb) Waterc) Animals (insects)

Notes3. _________ _________ petals attract birds

and insects to a flower.

4. Life Cycle of a Flowering Plant:

A. Pollen is moved from the ___________ to the ___________.

B. The plant forms a __________.

C. The plant releases a ___________.

D. When the seed ___________, a young plant will grow.

Notes5. For flowering plants, the life span begins

when a seed __________.

6. In organisms that are similar, such as trees, the smaller kinds usually have shorter life spans than the larger kinds.

Lesson 2: Animal Life Cycles

Key Vocabulary

1. adult-

A fully grown, mature organism

2. egg-The first stage in the life cycle of most animals

3. larva-

A worm-like form and the second stage of complete metamorphosis

4. metamorphosis-The process in which an animal changes form in different stages of its life cycle

5. nymph-The second stage of incomplete metamorphosis

Lesson 2 Notes1. Life cycle with __________ metamorphosis.

Egg

Adult

Pupa

Larva

Lesson 2 Notes2. Life cycle with __________ metamorphosis.

Egg

Adult Nymph

Lesson 2 Notes3. All ________ lay eggs, but _________ do not

lay eggs.

4. Many insects change form ______ times. – Examples: Butterflies, Ladybugs, Bean Beetles

5. In general, _________ _________ have shorter life spans than __________ __________ of the same kind.

Lesson 2 Notes6. A _________ looks like an adult, but has no

_________.

Lesson 3: Parents and Offspring

Key Vocabulary

1. inherit-

to receive traits from a parent

2. trait-a feature or a characteristic of a living thing

Lesson 3 Notes1. A __________ trait is a trait that is passed from

parents to offspring through reproduction. This is why parents and offspring usually ____________ (look like) each other.

2. Organisms with 2 parents __________ ________ from both parents.

3. A tadpole looks like its parents after ________ ____________.

Lesson 3 Notes4. Living things

resemble their parents

Examples: Blue eyes, curly hair

Examples: Frogs

Organisms inherit traits

Some offspring look different, but grow to look like

their parents