How do living things have children?
Options:
- (A) death
- (B) people
- (C) humans
- (D) babies
- (E) it needs them
- (F) reproduction
- (G) mitosis
- (H) production
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Let's think first: Reproduction is the process by which living things give rise to offspring. Seed refers to offspring, children. Living things use reproduction to have children.... So the answer is [(F)]

What does not grow through cell division?
Options:
- (A) p53
- (B) AIDS
- (C) host
- (D) DDT
- (E) lung
- (F) HIV
- (G) corn
- (H) HPV
--
Let's think first: Populations of viruses do not grow through cell division because they are not cells. Where most viruses are DNA, HIV is an RNA virus. Populations of HIV do not grow through cell division because they are not cells.... So the answer is [(F)]

What type of evolution is very, very slow above the level of the species?
Options:
- (A) forest is destroyed
- (B) macroevolution
- (C) animals
- (D) parallel evolution
- (E) mechanical
- (F) Continents drifting
- (G) divergent evolution
- (H) microevolution
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Let's think first: Macroevolution is evolution over geologic time above the level of the species. And geologic time is very, very slow. Macroevolution is very, very slow evolution above the level of the species.... So the answer is [(B)]

What kind of animal doesn't have a respiratory or excretory system?
Options:
- (A) a fish
- (B) bears
- (C) ant
- (D) whale
- (E) humans
- (F) starfish
- (G) mammals
- (H) llama
--
Let's think first: Echinoderms lack respiratory and excretory systems. Starfish and sea urchins are also echinoderms. Starfish lack respiratory and excretory systems.... So the answer is [(F)]

What has circulatory system with a two-chambered heart?
Options:
- (A) sharks
- (B) trout
- (C) pan
- (D) toads
- (E) Birds
- (F) animals
- (G) mammals
- (H) Man
--
Let's think first: Fish have a circulatory system with a two-chambered heart. Fish species include salmon and trout. Salmon and trout have a circulatory system with a two-chambered heart.... So the answer is [(B)]

What do all vertebrates have?
Options:
- (A) fur and fat
- (B) sensory neurons
- (C) Veins and arteries.
- (D) four limbs
- (E) jaws and scales
- (F) a slimy coat
- (G) jaw and a backbone
- (H) feathers
--
Let's think first: Vertebrates are all chordates that have a backbone. All chordates have jaws. Vertebrates have a jaw and a backbone.... So the answer is [(G)]