A sea star has which type of body-part arrangement?

Reptiles are different from amphibians because reptile skin is __________.

Which of these is NOT a characteristic of all mammals?

Which group of vertebrates includes many species that change body form during development and spend part of their lives in water and part on land?

Which feature do birds and reptiles have in common?

Which term belongs in box A?

Which term belongs in box B?

The vertebrae, skull, and other bones make up a vertebrate's __________.

Which system sends messages through nerves to and from all parts of your body?

The system of nerve cells in cnidarians is called __________.

Which best describes where oxygen goes after being taken into an animal's body?

Water taken in through the mouth of a fish passes over the __________, where oxygen and carbon dioxide are exchanged.

Most reptiles have a __________ heart.

Which of the following special structures does an earthworm use to grind up soil it ingests?

Which is NOT a function of the nervous system?

Which is NOT carried throughout the body by the circulatory system?

What are enzymes in the digestive system?

Which term belongs in box A?

Which term belongs in box B?

Which term belongs in box C?

What is the predominant type of muscle shown in the diagram?

__________ makes movement easier by reducing friction that might happen if bones rubbed together.

The outer layer of skin is called the__________.

Food moves through your digestive system. What type of muscle makes this action happen?

Two or more bones come together at __________.

Which of these is NOT a layer of skin?

What type of joint do your elbows have?

If you do not have enough calcium in your diet, your body will use calcium stored from where?

What type of muscle attaches to bones?

Which term belongs in box A?

Which term belongs in box B?

Which of the following does NOT work closely as part of the excretory system?

What organ removes excess water, salts, and other wastes from your blood?

Which of these is the correct sequence of the organs of the digestive tract?

Which product of the excretory organs is produced and stored by the system in the figure?

What structures lining the inside of the small intestine provide a place where nutrients can pass to the blood?

Which term belongs in box A?

Which term belongs in box B?

Which term belongs in box C?

________ carry blood away from the heart.

What is the process that is shown in the figure?

Which of these is a function of blood?

From the chart, viruses and bacteria are the cause of which respiratory disease?

What is the difference between veins and arteries?

Recycling red blood cells is the function of which organ?

Which term belongs in box A?

Which term belongs in box B?

Which term belongs in box C?

Disease-causing organisms are called ______.

A disease that is caused by a virus, bacterium, protist, or fungus and is spread from an infected organism or the environment to another organism is called a(n) _______.

The process of heating a liquid to kill much of the bacteria in milk and other liquids is called __________.

Which acts as a barrier that prevents many pathogens from entering your body?

Forms of antigens that give you active immunity to a disease without getting the disease first are called __________.

Which healthy choice will most directly prevent skin cancer?

What is chemotherapy?

Which term belongs in box A?

Which term belongs in box B?

Which of the following is a reflex?

Which system sends messages through nerves to and from all parts of your body?

Which of the following does the skin NOT sense?

Which part of the central nervous system is responsible for movement and thought?

Which term refers to something in the environment that causes an organism to react?

Which term belongs in box A?

Which term belongs in box B?

Which term belongs in box C?

What process is shown in this figure?

A puddle is formed after a rainstorm. After two days of sunshine, the puddle disappears. What happened to the water?

_________ describes the weather patterns that affect a region over a long period of time.

Earth’s early atmosphere probably did not contain oxygen gas. Scientists believe that __________ are responsible for producing most of the oxygen in Earth’s early atmosphere.

Without this, Earth could become too hot or cold to support life as we know it.

Which of these is an abiotic factor?

What is the process where producers use carbon dioxide, water, and light energy to make sugars?

What does the diagram illustrate?

What is this diagram an example of?

Which includes both an abiotic and a biotic factor?

Which term belongs in box A?

Which term belongs in box B?

Which term belongs in box C?

The organisms living in an area and the nonliving features of that environment form __________.

All the tortoises living in a specific region of a desert ecosystem make up what?

The largest number of organisms from a particular species that can live in an ecosystem at one time is the __________ for that species in that ecosystem

Which of these organisms is a producer?

Compared to a carnivore, what advantage does an omnivore have?

What is required for a species to experience exponential growth?

Which fact is correct about most food chains?

What is most likely to happen to an overpopulated species?

In a particular area, a species is considered endangered if there are less than 800 individuals left. Based on the chart, which species would be considered endangered?

What are all organisms of the same species occupying the same area at the same time known as?

Which term belongs in box A?

Which term belongs in box B?

Which are usually shallow and filled with an abundance of plant and animal life?

Which biome is characterized by the coldest temperatures?

The first organisms to appear during ecological succession are called ____.

What biome is found at the farthest north latitudes?

Which biomes are most often found near the equator?

Warm temperatures and large amounts of rainfall characterize which biome?

What types of organisms would be found in this stage of primary succession?

Primary succession begins in an area without _____

In which water ecosystem does salt water and freshwater mix?