What are lion communities called?
Options:
- (A) complex
- (B) PDAs
- (C) groups
- (D) protected
- (E) prides
- (F) murders
- (G) flocks
- (H) dangerous
--
Let's think first: Lions live in social groups called prides. Chimpanzees live in social groups called communities. Lions live in communities called prides.... So the answer is [(E)]

What infects and destroys helper t cells?
Options:
- (A) swea
- (B) Wasps
- (C) AIDS
- (D) CO 2
- (E) PDAs
- (F) humans
- (G) heat
- (H) anemia
--
Let's think first: HIV infects and destroys helper T cells. Scientists agree that HIV causes Aids. AIDS infects and destroys helper T cells.... So the answer is [(C)]

Arthropods are small animals with how many legs?
Options:
- (A) 2
- (B) millipede
- (C) Aves
- (D) six
- (E) long
- (F) one hundred
- (G) legs
- (H) two
--
Let's think first: Most arthropods are insects. An insect is a small animal with six legs. Most arthropods are small animals with six legs.... So the answer is [(D)]

If a tumor has formed, this gene might have mutated:
Options:
- (A) p53
- (B) SNPs
- (C) OCA 2
- (D) DNA
- (E) gene
- (F) tRNA
- (G) malignancy
- (H) TRH
--
Let's think first: Cells that divide uncontrollably may form a tumor, or abnormal mass of cells. When p53 is mutated, cells divide uncontrollably. When p53 is mutated a tumor may form.... So the answer is [(A)]

What ccurs when many muscles contract a little bit all at once?
Options:
- (A) heat production
- (B) heat loss
- (C) sweating
- (D) permineralization
- (E) hypothermia
- (F) resistance
- (G) cramping
- (H) heat energy
--
Let's think first: Shivering occurs when many muscles contract a little bit all at once. Heat production is increased by shivering and non-shivering thermogenesis . Heat production occurs when many muscles contract a little bit all at once.... So the answer is [(A)]

What can frogs, toads and salamanders use to smell and taste chemicals?
Options:
- (A) sense organs
- (B) Chemical energy
- (C) matter vibrating
- (D) larynx
- (E) Organic compounds
- (F) ocular organs
- (G) gills
- (H) harmful substances
--
Let's think first: Amphibians have sense organs to smell and taste chemicals. Frogs, toads and salamanders are amphibians. Frogs, toads, and salamanders have sense organs to smell and taste chemicals.... So the answer is [(A)]