1. Which human traits form a wide range of states instead of two distinct states?
A) cleft chin
B) eye color
C) widow's peak
D) fully attached earlobes

2. Don's earlobes are fully attached, Both of his parents have free earlobes (not fully attached). One of Don's grandparents has fully attached earlobes, like he does.
What can be said about fully attached earlobes?
A) Fully attached earlobes are dominant. Both of Don's parents do not have them
B) Fully attached earlobes are recessive. Both of Don's parents have them.
C) Fully attached earlobes are dominant. They skip a generation in inheritance.
D) Fully attached earlobes are recessive. They skip a generation in inheritance.

3. A scientist is doing experiments using some ancient seeds discovered in an ancient temple.
Which option is a prediction that relates the outcome of the scientist's experiments with probability?
A) The scientist thinks that the seeds were in the temple as part of a ritual.
B) The scientist thinks that more seeds can be recovered from other similar locations on Earth.
C) The scientist thinks that seeds that are old have 0% chance of sprouting; so, if they do, they must be modern.
D) The scientist thinks that if conditions are good, about 10% of the seeds will sprout and grow into plants

4. Which option describes how genes control the traits of a cell?
A) Genes code for specific structures and molecules in a cell. Those structures and molecules form the traits of the cell.
B) Genes become building blocks for specific structures and molecules in a cell. Those structures and molecules farm the traits of the cell.
C) Genes determine how much energy goes to each organelle in the cell. The organelles form the traits of the cell.
D) Genes are molecules that organelles are made out of. Once assembled into organelles, they form the traits of the cell.