What is a tree with a woody trunk?
Options:
- (A) conifer
- (B) orchids
- (C) plants
- (D) trees
- (E) less water
- (F) vines
- (G) lycophytes
- (H) ferns
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Let's think first: Most modern gymnosperms are trees with woody trunks. Conifers are examples of gymnosperms. Conifers are trees with woody trunks.... So the answer is [(A)]

What systems are pollutants bad for?
Options:
- (A) destroying life
- (B) classification system
- (C) an organism's body
- (D) respiratory and circulatory
- (E) animal habitats
- (F) ambulatory systems
- (G) social security system
- (H) the environment
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Let's think first: Air pollution harms the respiratory and circulatory systems. Air pollution is caused by lots of different pollutants. Several different pollutants harm the respiratory and circulatory systems.... So the answer is [(D)]

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
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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)]

What is used as energy by most organisms?
Options:
- (A) sodium
- (B) water
- (C) energy.
- (D) food
- (E) sugar
- (F) Energy
- (G) solutes
- (H) light
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Let's think first: Glucose is used for energy by the cells of most organisms. For instance, glucose is a sugar. Sugar is used for energy by the cells of most organisms.... So the answer is [(E)]

What can have motility?
Options:
- (A) Small things with a microscope
- (B) gastropod shells
- (C) members of their own species
- (D) one celled organisms
- (E) Something to move
- (F) mitochondria
- (G) rocks
- (H) intestines
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Let's think first: Most protists have motility. Protists are one celled organisms. One celled organisms can have motility.... So the answer is [(D)]

Cells have multiple repair mechanisms to fix mutations in what?
Options:
- (A) Veins and arteries.
- (B) Most plants
- (C) the body's largest organ
- (D) members of their own species
- (E) wavelengths and photons
- (F) epidermis and dermis
- (G) deoxyribonucleic acid
- (H) peachleaf willow
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Let's think first: Cells have multiple repair mechanisms to fix mutations in DNA. DNA DNA is deoxyribonucleic acid. Cells have multiple repair mechanisms to fix mutations in deoxyribonucleic acid.... So the answer is [(G)]