q: What use energy and minerals to make food?
Options:
- (A) trees
- (B) plant life
- (C) humans
- (D) producers
- (E) bears
- (F) elephants
- (G) Most plants
- (H) ferns
a: (D)... Explanation: Producers use energy and inorganic molecules to make food. Minerals are inorganic substances. Producers use energy and minerals to make food. That's why the answer is (D).

q: 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
a: (A)... Explanation: 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. That's why the answer is (A).

q: Where do organisms cluster on the ocean floor?
Options:
- (A) neutralized water
- (B) where they used to live
- (C) hot alkaline water
- (D) fissures of hot, acidic water
- (E) sedimentary rocks
- (F) fissures blasting cold water
- (G) at or near the margins
- (H) an area swollen with pus
a: (D)... Explanation: Organisms cluster around hydrothermal vents in the ocean floor. Hydrothermal vents are fissures in the ocean floor that leak hot, acidic water. Organisms cluster around fissures in the ocean floor that leak hot, acidic water. That's why the answer is (D).

q: What do cells make up of organisms?
Options:
- (A) structure only
- (B) function only
- (C) structure and function
- (D) members of their own species
- (E) Something that is self-aware
- (F) share properties
- (G) desires and needs
- (H) Most plants
a:
(C)... Explanation: Cells are the basic units of the structure and function of living things. An organism is a living thing or something that was once alive. Cells are the basic units of the structure and function of organisms. That's why the answer is (C).