Logic of a solution: *Roots have primary and secondary meristems for growth in length and width. Meristems are zones of intense activity. Roots are zones of intense activity.*
*(A)*
The original question: *Where does intense activity occur in a plant?
Options:
- (A) Roots
- (B) Buds
- (C) bamboo
- (D) fields
- (E) Summer
- (F) years
- (G) Hairs
- (H) Petals*
Line 1: *Blood pH may become unbalanced if the rate of breathing is too fast or too slow. Mammals breathe with lungs. Blood pH may become unbalanced if the lungs are working too fast or too slow.*
*(H)*
Line 2: *What may become unbalanced if the lungs are working too fast or too slow?
Options:
- (A) Decibels
- (B) hair on head
- (C) air pressure
- (D) gasoline levels
- (E) Acids
- (F) energy usage
- (G) brain chemistry
- (H) blood pH*
Logic of a solution: *Cancer genes can be inherited. Children inherit from their parents. Cancer genes can be passed on by parents.*
*(G)*
The original question: *Parents can pass on many genes, including those for:
Options:
- (A) the eyes
- (B) trust accounts
- (C) animals
- (D) babies
- (E) cremation
- (F) clothing
- (G) cancer
- (H) offspring*
Line 1: *Streams may start with runoff or water seeping out of a spring. Lakes and streams are sources of drinking water. Water seeping out of a spring is a source of drinking water.*
*(E)*
Line 2: *What is a source of drinking water?
Options:
- (A) ice expanding in rock openings
- (B) helping to prevent floods
- (C) industrial runoff
- (D) it helps plants in growing
- (E) Water seeping out of a spring
- (F) salt water
- (G) polluted water
- (H) Something with a head, thorax, and abdomen*
Logic of a solution: *Birds are endothermic tetrapod vertebrates. Class Aves is for the birds, literally. Animals in the class aves are endothermic tetrapod vertebrates.*
*(A)*
The original question: *What kind of animal would be an endothermic tetrapod vertebrate?
Options:
- (A) animals in the class aves
- (B) barks and snarls
- (C) passenger pigeons
- (D) Something that is self-aware
- (E) Generating heat
- (F) retaining heat
- (G) absorb light energy
- (H) it keeps an organism warm*
Logic of a solution: *Echinoderms lack a centralized nervous system. Echinoderms are represented by the starfish. Starfish lack a centralized nervous system.*
*(B)*
The original question:
*What is something missing in starfish?
Options:
- (A) the body's largest organ
- (B) centralized nervous system
- (C) characteristics
- (D) layers of fat
- (E) permineralization
- (F) biological diversity
- (G) kinetic energy
- (H) A compound that donates proton*