Logic of a solution: *Insulin is a hormone that helps cells absorb sugar from the blood. Diabetes is caused by a lack of insulin. Diabetes is caused by a lack of hormone that helps cells absorb sugar from the blood.*
*(D)*
The original question: *What is caused by a lack of a hormone that helps cells absorb sugar from the blood?
Options:
- (A) glucose
- (B) cancer
- (C) resistance
- (D) diabetes
- (E) fever
- (F) serotonin
- (G) epilepsy
- (H) Dehydration*
Line 1: *Adult echinoderms have radial symmetry. Animals with radial symmetry lack an anterior and posterior end. Adult echinoderms lack an anterior and posterior end.*
*(G)*
Line 2: *Which species doesn't have an anterior or posterior end?
Options:
- (A) animals
- (B) peachleaf willow
- (C) Rabbits
- (D) Blowfish
- (E) fur seals
- (F) Snakes
- (G) Echinoderms
- (H) alpacas*
Logic of a solution: *Bivalves feed on plankton and nonliving organic matter. Mussels are bivalve mollusks. Mussels eat plankton and nonliving organic matter.*
*(E)*
The original question: *What do mussels eat?
Options:
- (A) bivalves
- (B) sub-units of species
- (C) Something coming from a gland
- (D) mussels
- (E) plankton and nonliving organic
- (F) Something made from fermented ricce
- (G) mollusks
- (H) Microscopic organisms*
Line 1: *All animals are heterotrophs. Proteins are an essential nutrient for heterotrophs . Proteins are an essential nutrient for animals.*
*(H)*
Line 2: *_ are an essential nutrient for animals.
Options:
- (A) Energy
- (B) Chemicals
- (C) trees
- (D) potatoes
- (E) Acids
- (F) allow growth
- (G) store
- (H) Proteins*
Logic of a solution: *Ethologists usually study how animals behave in their natural environment. Environments are animals homes. Ethologists usually study how animals behave in the animals' homes.*
*(G)*
The original question: *Ethologists study how animals behave in animals'
Options:
- (A) Summer
- (B) state
- (C) Birds
- (D) life
- (E) seasons
- (F) health
- (G) homes
- (H) fields*
Logic of a solution: *Mating is generally preceded by courtship. Courtship is similar across species. Mating is generally similar across species.*
*(E)*
The original question:
*What is generally similar across species?
Options:
- (A) tail fins
- (B) our star
- (C) the eyes
- (D) vision
- (E) mating
- (F) Flowers
- (G) bushes
- (H) alpacas*