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: What do male dogs use in urine to mark their territory?
Options:
- (A) Natural aphrodisiacs
- (B) competing for resources
- (C) Tails
- (D) Urine cleaner
- (E) Something coming from a gland
- (F) Chemical energy
- (G) an area swollen with pus
- (H) Chew toys
a: (A)... Explanation: Male dogs use pheromones in urine to mark their territory. Pheromones are natural aphrodisiacs. Male dogs use natural aphrodisiacs in urine to mark their territory. That's why the answer is (A).

q: Macroevolution can occur in the taxonomical level called:
Options:
- (A) ferns
- (B) alpacas
- (C) complex
- (D) three
- (E) cracking
- (F) family
- (G) PDAs
- (H) ligt
a: (F)... Explanation: Macroevolution occurs over geologic time above the level of the species. Few families rival Piperaceae for difficulties at the species level. Macroevolution can occur in the taxonomical level called family. That's why the answer is (F).

q: What direction does something that has oxygen-rich blood go?
Options:
- (A) mouth of rivers
- (B) the body's largest organ
- (C) move to different locations
- (D) Earth orbiting the Sun
- (E) Move to another area
- (F) to move people
- (G) animal transport
- (H) Away from the heart
a:
(H)... Explanation: Arteries generally carry oxygen-rich blood. Arteries carry blood away from the heart. Something that brings blood away from the heart carries oxygen-rich blood. That's why the answer is (H).