Unit 3: Plants and Animals

Unit 3: Plants and Animals

Plant Life Cycle

Stages of a Plants Life Cycle

Most plants come from seeds. A seed germinates when it breaks open and a seedling grows out of it.

The seedling grows into an adult plant. The adult plant makes flowers.

The flowers fall off the plant, and the plant makes fruit. The fruit holds the seeds.

Pollination

Plants that make seeds also make pollen.

Pollination happens when pollen is moved from the male plant part to the female plant part.

Wind, water, and animals help move pollen from plant to plant.

Mosses and Ferns

Mosses and ferns make spores instead of seeds.

These spores are part of the process for growing new mosses and ferns.

Multiple Choice

Ferns reproduce with......

• cones

• seeds

• spores

• magic

Multiple Select

Which help pollen and seed move from one place to another?

• wind

• water

• animals

Multiple Choice

When pollen is moved from a male plant part to a female plant part

• polluting

• crackling

• pollination

• dreaming

Multiple Choice

A seed germinates when...

• it breaks open and a small plant grows out of it

• makes more plants similar to itself

• makes fruit

• makes cones

Multiple Choice

A seed germinates when...

• it breaks open and a small plant grows out of it

• makes more plants similar to itself

• makes fruit

• makes cones

Animal Life Cycle

Life Cycles

An animal's life cycle begins at birth.

A life cycle is all of the changes that happen to an animal or plant until it reproduces.

Many very different animals go through similar changes.

Frog Life Cycle

Different animals have different life cycles.

Some young animals do not look like small versions of their parents.

Their bodies change even more during their life cycles.

They go through metamorphosis or a major change in the body form of an animal during its life cycle.

Insect Life Cycle

Most insects undergo metamorphosis. as they develop into adults.

Some go through complete metamorphosis or two stages of development between the egg and the adult.

Insect Life Cycle

Other insects go through incomplete metamorphosis.

This is when the insects look very much like adult insects.

Diversity

When two adult animals reproduce, the young animals maybe like their parents in many ways.

They are not exactly the same, though.

Because they can get some of their looks from each parent, they are unique.

This variety, or diversity, helps each kind of animal survive.

Multiple Choice

Dragonflies and grasshoppers go through ________ ___________.

• complete metamorphosis

• incomplete metamorphosis

• life cycle

Multiple Choice

Ladybugs go through complete metamorphosis.

• True

• False

Multiple Choice

The process in which some organisms change form in different stages of their life cycle is known as?

• Metamorphosis

• Germination

• Life span

Multiple Choice

What is the first stage in the life cycle of most animals?

• Egg

• Adult

• Larva

Multiple Choice

Plants and animals both have life cycles.

• True

• False

Multiple Choice

The series of stages that occur in the lifetime of an organism is called?

• Life span

• Life cycle

Structural Adaptations

An adaptation is any trait that helps a living thing to survive.

Animals that are hunted for food are called prey. Animals that hunt prey are called predators.

Predators and prey have adaptations that help them catch food or avoid being eaten.

Staying Safe

Defense adaptations may attack a predator’s sense of sight, smell, taste, touch, or hearing.

A bad taste, loud noise, or nasty odor is often enough to make a predator go away.

Creature Costumes

Some animals can hide without trying. These animals are hidden by their shapes, colors, or patterns.

Such disguises are called camouflage.

Creature Costumes

Some harmless animals look like animals that are harmful to predators. Since predators don’t know which animal is harmful, neither gets eaten.

Imitating the look of other animals is called mimicry.

Multiple Choice

The picture below shows an example of:

• mimicry

• camouflage

Multiple Choice

This picture shows an example of:

• camouflage

• mimicry

Multiple Choice

________________ helps an animal blend into its surroundings.

• Camouflage

• Mimicry

Multiple Choice

_________________ help living things survive in their environments.

• Adaptations

• Camouflage

Multiple Choice

_________________ help living things survive in their environments.

• Adaptations

• Camouflage

Behavioral Adaptations

Behavior is anything an organism does.

Learned behaviors are behaviors that come from watching other animals or through experience.

Instinct is a behavior that an animal knows without learning it.

Hibernation

Some animals hibernate or go into a deep, sleeplike state that helps them survive the cold winter conditions.

Migration

Animals migrate when they move a long distance as a group from one region to another and back.