(question). Adults of what kind of animal have radial symmetry?
Options:
- (A) graptolites
- (B) starfish
- (C) a fish
- (D) fur seals
- (E) alpacas
- (F) insects
- (G) fertile
- (H) barnacles
(answer). Adult echinoderms have radial symmetry. Echinoderms are represented by the starfish. Adult starfish have radial symmetry.
The answer is (B)

(question). What can fats consist of?
Options:
- (A) Energy
- (B) Weight
- (C) ice
- (D) chlorophyll
- (E) water
- (F) Energy.
- (G) Chemical energy
- (H) fatty acid
(answer). Lipids may consist of fatty acids alone, or they may contain other molecules as well. Fats are known as lipids. Fats may consist of fatty acids alone, or they may contain other molecules as well.
The answer is (H)

(question). How is survival ensured around hydrothermal vents?
Options:
- (A) heat produced
- (B) Eating a lot
- (C) Reproducing quickly
- (D) biological diversity
- (E) vegetation
- (F) Being in a cluster
- (G) Staying far apart
- (H) hydrate their cells
(answer). Organisms cluster around hydrothermal vents in the ocean floor. To survive, some organisms living near hydrothermal vents have formed close associations. Clusters form around hydrothermal vents to ensure survival.
The answer is (F)

(question). What gets organic compounds from dead organisms?
Options:
- (A) plants
- (B) elms
- (C) mud
- (D) molds
- (E) dead cats
- (F) cows
- (G) trees
- (H) sludge
(answer).
Most fungi get organic compounds from dead organisms. Molds are microscopic fungi. Molds get organic compounds from dead organisms.
The answer is (D)