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: *Oncogenes promote the division of cells with damaged DNA. Carcinogenic or oncogenic effects cause cancer. Carcnogenic substances can promote division of cells with damaged DNA.*
*(H)*
Line 2: *Cells with damaged dna are more likely to divide when exposed to what?
Options:
- (A) harmful substances
- (B) apoptotic genes
- (C) sulfur dioxide
- (D) a tumor suppressor
- (E) Electrical energy
- (F) heat or cold
- (G) immune system
- (H) a carcinogen*

Logic of a solution: *Mutation creates new genetic variation in a gene pool. Genetic variation is the basis for natural selection. Mutation is a basis for natural selection.*
*(C)*
The original question: *What is a basis for natural selection?
Options:
- (A) fur and fat
- (B) competition
- (C) mutation
- (D) root growth
- (E) insects
- (F) animals
- (G) trees
- (H) cows*

Line 1: *Energy enters ecosystems in the form of sunlight or chemical compounds. If there is sun, there is sunlight, there is day. Energy enters ecosystems from the sun.*
*(B)*
Line 2: *The sun contributes what to ecosystems?
Options:
- (A) sun spot
- (B) energy
- (C) darkness
- (D) seeds
- (E) positive
- (F) photons
- (G) Nutrients
- (H) Energy.*

Logic of a solution: *Insulin is a hormone that helps cells absorb sugar from the blood. Blood Sugar Glucose is sugar. Insulin is a hormone that helps cells absorb glucose from the blood.*
*(C)*
The original question: *Insulin is a hormone that helps absorb what from the blood?
Options:
- (A) hormones
- (B) blood cells
- (C) glucose
- (D) Energy
- (E) water
- (F) Energy.
- (G) Joules
- (H) hydration*

Logic of a solution: *DNA contains genetic instructions for proteins, and RNA helps assemble the proteins. RNA hybrids are then detected by a luminometer. A luminometer detects hybrids of the substance that helps assemble proteins.*
*(D)*
The original question:
*What detects hybrids of the substance that helps assemble proteins?
Options:
- (A) orchids
- (B) sensory neurons
- (C) peachleaf willow
- (D) luminometer
- (E) A computer
- (F) animals
- (G) A Greek letter
- (H) scattered light*