q: The group of bipedal dinosaurs that included dromaeosaurs eventually evolved into:
Options:
- (A) insects
- (B) animals
- (C) mammals
- (D) running
- (E) Man
- (F) alpacas
- (G) genus
- (H) birds
a: (H)... Explanation: Birds evolved from a group of bipedal dinosaurs called theropods. Dromaeosaurs are part of the theropod group of dinosaurs. Birds evolved from a group of bipedal dinosaurs that included Dromaeosaurs. That's why the answer is (H).

q: Many _ can cause the immune system to not work properly.
Options:
- (A) fever
- (B) bacteria
- (C) radiation
- (D) fungi
- (E) A drug.
- (F) Allergies
- (G) cancers
- (H) Toxicity
a: (G)... Explanation: Immunodeficiency occurs when the immune system is not working properly. Many cancers can cause immunodeficiency. Many cancers can cause the immune system to not work properly. That's why the answer is (G).

q: Which of these diseases cannot reproduce by itself?
Options:
- (A) fever
- (B) Leptospirosis
- (C) animals
- (D) influenza
- (E) bacteria
- (F) heat or cold
- (G) dangerous
- (H) anemia
a: (D)... Explanation: Viruses cannot reproduce by themselves. Influenza is a disease caused by viruses. Influenza is a disease that cannot reproduce by itself. That's why the answer is (D).

q: Which type of pollution is most harmful to lungs?
Options:
- (A) Lead
- (B) air
- (C) Cars
- (D) oil
- (E) acid
- (F) CFCs
- (G) SO2
- (H) mold
a:
(B)... Explanation: Air pollution harms the respiratory and circulatory systems. Exposure to ozone can diminish lung function and increase susceptibility to respiratory infection. Exposure to air pollution can harm the lungs. That's why the answer is (B).