Logic of a solution: *Communities consist of populations of different species. Biodiversity is a lot more than just the number of different plant and animal species. Communities consist of populations that are biodiverse.*
*(E)*
The original question: *Populations that are biodiverse might be called:
Options:
- (A) homogenous enclaves
- (B) similar
- (C) animals
- (D) peachleaf willow
- (E) communities
- (F) bottlenecks
- (G) insects
- (H) fertile*

Line 1: *Amphibians have permeable skin that easily absorbs substances from the environment. All frogs are amphibians. Frogs have permeable skin that easily absorbs substances from the environment.*
*(D)*
Line 2: *What feature allows frogs to absorb substances from the environment?
Options:
- (A) four limbs
- (B) poison dart frog
- (C) hydrate their cells
- (D) permeable skin
- (E) layers of fat
- (F) a cuticle
- (G) predators
- (H) double eyelid*

Logic of a solution: *Sweat wets the skin, and when it evaporates, it cools the body. High humidity interferes with evaporation of the sweat. High humidity interferes with cooling of the body.*
*(H)*
The original question: *What interferes with cooling of the body?
Options:
- (A) low humidity
- (B) snow
- (C) ice
- (D) Sulfur dioxide
- (E) Leptospirosis
- (F) Smoking
- (G) heat or cold
- (H) high humidity*

Line 1: *Genes that are located on the same chromosome are called linked genes. Chromosomes and Chromosome Links Chromosomes are wonderful. Genes can be located on something wonderful.*
*(H)*
Line 2: *Genes can be what on something wonderful?
Options:
- (A) singing
- (B) ligt
- (C) vacationing
- (D) exploded
- (E) fertile
- (F) good
- (G) positive
- (H) located*

Logic of a solution: *Reproduction is the process by which organisms give rise to offspring. Mutations are sources of variations in offspring. Mutations can occur during the reproduction process.*
*(B)*
The original question: *What can happen during the reproduction process?
Options:
- (A) tree falls
- (B) Mutations
- (C) Plants growth
- (D) movement
- (E) competition
- (F) adding heat
- (G) contamination
- (H) Dehydration*

Logic of a solution: *Arteries generally carry oxygen-rich blood. Arteries carry blood away from our heart. Oxygen-rich blood is carried away from our heart.*
*(F)*
The original question:
*Oxygen-rich blood is carried where?
Options:
- (A) it keeps an organism warm
- (B) mouth of rivers
- (C) The area was once underwater
- (D) running and lifting
- (E) the body's largest organ
- (F) away from the heart
- (G) Earth orbiting the Sun
- (H) four limbs*