Biology VBA 3 Review - Unit 1: Science Process and Biochemistry

Which of the following is an example of an inference?

• There are 12 children playing baseball in the playground.

• Someone playing baseball must have broken the neighbor’s window.

• The neighborhood children are playing baseball.

• Two of the children playing baseball are girls.

Which of the statements below is an example of an inference that can be made from the picture?

• The child has a cat on his head.

• The child is hanging from a branch.

• The child got stuck as he was saving a cat.

• The child is smiling.

Which of the following statements below is an example of a quantitative observation?

• Four mice were fed different types of food.

• More mice gained weight eating the mixed food.

• The different foods were rice, grain, corn, and a mixture.

• The weight of the mice was recorded weekly.

Which of the following is a good conclusion for the data graphed?

• Plants take a long time to germinate.

• Plants grow extremely slow during germination.

• Plants will grow the highest during the 7th day of germination.

• Plants grow at a constant rate during germination.

What is the independent variable in this chart?

• Mass gained

• Number of weeks

• Mouse number

• Type of food

A student is doing an experiment to determine how a change in acidity affects enzyme activity. The time it takes for a disk soaked with catalase (an enzyme) at different acidities to rise to the top of a vial containing 1% hydrogen peroxide will be measured. If the student presents the findings in a line graph, which of the following conditions will be represented on the x-axis of the graph?

• disk rise times

• catalase concentrations

• pH values

• percent hydrogen peroxide

What is the independent variable in this graph?

• Height (in)

• Number of days after germination

• 9 inches

• 7 days

What is the dependent variable in the Sunlight vs Bacteria graph?

• Number of bacteria

• Hours of sunlight

• Both A and B

• There is no

Many fish and aquatic plants can survive a cold winter because the layer of ice that forms at the top of the lake insulates the water below and prevents the lake from freezing solid. What unique property of water contributes to this effect?

• Water expands and becomes less dense when it freezes.

• Water absorbs heat when it evaporates and forms a gas.

• Water molecules separate into ions in solutions.

• Water forms hydrogen bonds with ions and other polar substances

Human blood contains approximately 83% water. Which property of water makes it an essential component for carrying nutrients and gases in the body?

• Water has a pH of 7

• Water dissolves many substances

• Water expands when frozen

• Water has high specific heat