Quizizz 18B (1920 8/10 1/11)

A technique used to analyze pigments in spinach leaves is shown in the diagram. This technique is known as

• paper chromatography

• gene manipulation

• dissection

• staining

A student conducted an experiment to determine if listening to different types of music would affect pulse rate. She thought that pulse rate would change with different types of music. Each person participating in her experiment listened to seven different selections of music for 30 seconds each. The pulse rates were taken after each 30-second interval of music. Based on her experiment, the student concluded that a person’s pulse rate changed when listening to different types of music. The component missing from this experiment is a

• prediction

• hypothesis

• control group

• research plan

An experiment was carried out to determine whether drinking caffeinated soda increases pulse rate. The pulse rates of two groups of people at rest were measured. Group A was then given caffeinated soda and group B was given caffeine-free soda. One hour after drinking the soda, the pulse rates were measured. The participants in the experiment were all the same age, and they were all given the same amount of soda. The dependent variable in this experiment is the

• type of soda given to each group

• amount of soda given to each group

• pulse rate of each group

• age of participants in each group

Identify the color of the contents of the artificial cell after two hours.

• amber

• blue black

• orange

• colorless

After two hours, the color of the liquid in the beaker did not change. This shows that

• glucose moved from the artificial cell into the beaker

• starch did not pass out of the artificial cell

• starch was digested to glucose in the artificial cell

• glucose molecules combined to produce starch in the artificial cell

This laboratory setup would most likely be used to demonstrate

• carbohydrate synthesis

• active transport

• diffusion

• dehydration

The diagram shows stages of human reproduction.The direct result of fertilization is represented at

• A

• B

• C

• D

Certain organisms are able to store energy from the Sun in energy-rich compounds. Which event best illustrates this activity?

• A fox captures and eats a young rabbit.

• A caterpillar is eaten by a blackbird.

• Lettuce produces organic substances.

• Bacteria change organic material into simple nutrients.

The diagram shows how a chemical message produced by one cell is received by other cells. If these chemical messages are destroyed, the target cells will

• produce their own chemical messages

• not respond with appropriate actions

• develop different receptors

• no longer be produced in the organism

The diagram represents a cross section of a leaf of a green plant, showing an opening (stomate) in the lower surface. A stomate in the lower surface of the leaf has a function most similar to the function of which cell structure?

• cell membrane

• vacuole

• ribosome

• nucleus