Logic of a solution: *Most plants grow roots down into the soil to absorb water and minerals. Plant roots begin to stabilize the soil against erosion. The need for plants to absorb minerals and water from the soil also leads to them preventing soil erosion.*
*(A)*
The original question: *What is a positive effect of plant needs for water and minerals from soil?
Options:
- (A) erosion prevention
- (B) reducing acid rain
- (C) It helps them survive
- (D) agriculture
- (E) nutrient deficiency
- (F) water run-off
- (G) erosion
- (H) Exfoliation*

Line 1: *Most invertebrates have a nervous system. Insects are the most common invertebrates. Insects have a nervous system.*
*(H)*
Line 2: *What has a nervous system?
Options:
- (A) animals
- (B) tortoises
- (C) crocodiles
- (D) sponges
- (E) elephants
- (F) placozoans
- (G) mesozoans
- (H) insects*

Logic of a solution: *Viruses are not cells. Viruses include the Tobacco Mosaic Virus. Tobacco mosaic is not made up of cells.*
*(C)*
The original question: *What is not made up of cells?
Options:
- (A) an object
- (B) Veins and arteries.
- (C) Tobacco mosaic
- (D) an organism's body
- (E) Conifers
- (F) sensory neurons
- (G) layers of fat
- (H) the digestive system*

Line 1: *Behaviors can be learned through play. Girls have played with dolls for generations. Girls have used dolls to learn behaviors for generations.*
*(H)*
Line 2: *Girls have used what to learn behaviors for generations?
Options:
- (A) Birds
- (B) trees
- (C) rainbows
- (D) sound
- (E) alleles
- (F) bows
- (G) nerves
- (H) dolls*

Logic of a solution: *Prokaryotes are single-celled organisms that lack a nucleus. Prokaryotes are usually microscopic and bacteria is an example of a prokaryote. Bacteria are single celled organisms that do not have a nucleus.*
*(H)*
The original question: *What are single celled organisms that do not have a nucleus?
Options:
- (A) Most plants
- (B) nucleus
- (C) ferns
- (D) fossil fuels
- (E) bushes
- (F) Eukaryotes
- (G) leech
- (H) bacteria*

Logic of a solution: *Adult sponges are sessile. Sessile Attached permanently, immobile. Adult sponges are immobile.*
*(F)*
The original question:
*Which is immobile?
Options:
- (A) adult starfish
- (B) all matter
- (C) adult goldfish
- (D) gastropod shells
- (E) tadpoles
- (F) adult sponges
- (G) an object
- (H) an organism's body*