Chapter 4, Lesson 1 Physical Structures of Living Things

A(n) ___________________ is a hard skeleton on the outside of some animals that gives structure and protection.

(slide 5 in the lesson)

• internal skeleton

• exoskeleton

• vascular tissue

• system

Answer explanation

How are fish gills similar to plant stomata?

(slide 7 in the lesson)

• Both move blood.

• Both help with support.

• Both help with respiration.

• Both help move nutrients.

Answer explanation

Compare the body of a snake to an oak tree. A snake's skin is most like which part of the oak tree?

(slide 4 in the lesson)

• acorn

• bark

• leaf

• root

Answer explanation

The human skeletal system provides structure and support for the body. Which plant structure is most similar in function to the human skeletal system?

(slide 5 in the lesson)

• flower

• leaf

• stem

• root

Answer explanation

What is the benefit of a seed being inside a fruit?

(slide 4 in the lesson)

• fruits are eaten by animals

• fruits grow in the spring

• fruits are pretty to look at

• fruits grow slowly

Answer explanation

What is the benefit of stems in plants?

(slide 5 in the lesson)

• It uses little energy.

• It protects the plant.

• The stem is a main part.

• It gets the plant closer to the sun.

Answer explanation

The seed of a flowering plant forms inside the ovary.

(slide 6 in the lesson)

• True

• False

Answer explanation

When a living thing makes more of itself that is called respiration.

(slide 6 in the lesson)

• True

• False

Answer explanation

How do organisms get gas exchange?

(slide 7 in the lesson)

• lungs

• gills

• stomata

• all of these

Answer explanation

Vascular tissue in plants is similar to your blood vessels.

(slide 8 in the lesson)

• True

• False

Answer explanation