Mid-Unit Life Science Review

External Plant Structures

100

Sadie got a potted plant for her birthday. As she looked at the plant, Sadie noticed that it did not have flowers. How will this affect the plant?

1. It will not be able to produce seeds

2. It will not be able to take in water

3. It will not be able to make food

4. It will not be able to carry water through the stems

It will not be able to produce seeds

200

A dandelion seed is light enough to be carried by the wind. How does that help the dandelion plant reproduce?

1. It makes the seeds difficult for birds to eat.

2. It protects the seeds from other plants.

3. It carries the seed to places where new plants can grow.

4. It dries the seed.

It carries the seed to places where new plants can grow.

300

Why are flowers/petals important to some plants?

1. They defend the plant from predators

2. They store water until the next time it rains

3. They attract animals that pick up their pollen

4. They make food when the plant needs it

They attract animals that pick up their pollen

400

In which external structure does most food production take place?

1. Stem

2. Flower

3. Leaves

4. Roots

Leaves

500

Which external structure of this plant functions in making seeds for reproduction?

The flower

Internal Plant Structures

100

This internal/external structure absorbs water and nutrients

Roots

200

This internal structure grows into a fruit with seeds

Pistil

300

To make food, a leaf needs sunlight, water, and _______.

Carbon Dioxide

400

This internal structure transfers water and nutrients from the roots to the rest of the plant

Tubes in the stem

500

This internal structure makes pollen

Stamen

External Elephant Structures

100

Which of these structures is most important for helping an elephant communicate with and keep track of other elephants?

1. skull and teeth

2. liver and heart

3. ears and feet

4. skin and ribs

Ears and feet

200

In the fall, many birds migrate to warmer climates. Which external structure is most helpful to a migrating bird?

Wings

300

This external structure protects the internal organs

Skin

400

This external structure functions are both the nose and upper lip of an elephant

Trunk

500

This external structure has pads that sense sound vibrations

Feet

Internal Elephant Structures

100

This internal structure grinds up food

Teeth

200

This internal structure Stores food and begins to break it down

Stomach

300

This internal structure Carries food from the mouth to the stomach

Esophagus

400

This internal structure Makes chemicals that help digest food

Liver

500

This internal structure Breaks down food into sugars and other chemicals

Intestines