What can chordates go through?
Options:
- (A) disease
- (B) loss
- (C) skin
- (D) alveoli
- (E) death
- (F) painful
- (G) shock
- (H) illness
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Let's think first: Chordates have a complete digestive system and a closed circulatory system. Shock is a disruption of the circulatory system. Chordates can experience shock.... So the answer is [(G)]

What has a special excretory structure?
Options:
- (A) Silk plants.
- (B) Insects.
- (C) a fish
- (D) animals
- (E) plants
- (F) Architecture structures.
- (G) barnacles
- (H) Corset structure.
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Let's think first: Some arthropods have special excretory structures. All insects are arthropods. Insects have special excretory structures.... So the answer is [(B)]

Organelles that come in pairs are involved in what?
Options:
- (A) movement
- (B) Veins and arteries.
- (C) competition
- (D) Plants growth
- (E) Animal survival
- (F) cell division
- (G) an organism's body
- (H) Plant reproduction
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Let's think first: Centrioles are organelles involved in cell division. Centrioles come in pairs. Organelles that come in pairs are involved in cell division.... So the answer is [(F)]

What has a layer of fat under the skin to help insulate the body?
Options:
- (A) goats
- (B) snakes
- (C) hamburgers
- (D) animals
- (E) humans
- (F) rabbit
- (G) bears
- (H) fur
--
Let's think first: Mammals have a layer of fat under the skin to help insulate the body. All humans are mammals. Humans have a layer of fat under the skin to help insulate the body.... So the answer is [(E)]

The liver is formed after cells for into
Options:
- (A) death
- (B) humans
- (C) Energy.
- (D) tissue
- (E) migrate
- (F) grow
- (G) recovery
- (H) expelled
--
Let's think first: Cells are organized into tissues, and tissues form organs. Organs such as the stomach and liver also begin to develop. Cells are formed into tissues and tissues form the liver.... So the answer is [(D)]

Some producers use what physical feature to use energy and inorganic molecules?
Options:
- (A) leaves
- (B) sunlight
- (C) solar energy
- (D) sun
- (E) resevoir
- (F) chemicals
- (G) mitosis
- (H) trees
--
Let's think first: Producers use energy and inorganic molecules to make food. Leaves make food for the plant. Some producers have leaves to help use energy and inorganic molecules.... So the answer is [(A)]