Biology Data Analysis

A scientist designed an experiment to test the effect of temperature on bacterial growth. He grew three different cultures of the bacterium E. coli under three heat lamps at different temperatures. What was the independent variable in this experiment?

• growth

• temperature

• length of the experiment

• reproduction rate

Orchids were studied to determine if the amount of humidity affected the flowering of these plants. Which of these was the dependent variable in this study?

• the number of flowers

• the percentage of humidity

• amount watered

• the number of plants

Tags

NGSS.MS-LS1-5

Two plant species found in a dry region of the western United States exhibit vastly different abilities to survive. Species A has very slow stem growth and few leaves but is very abundant. Species B has rapid stem growth and many leaves but is very rare. Which hypothesis is most likely supported by this information?

• Flower size and color may give species B an advantage over species A.

• Leaf shape may give species B an advantage over species A.

• Reduced root growth may give species A an advantage over species B

• Reduced stem growth may give species A an advantage over species B.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Which variable appears to control leaf

production in these plants?

• number of seedlings

• temperature

• number of daylight hours

• number of new leaves

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Which sentence best states the importance of using control groups?

• Control groups provide a method by which statistical variability can be reduced.

• Control groups allow comparison between subjects receiving a treatment and those receiving no treatment.

• Control groups eliminate the need for statistical tests and simplify calculations.

• Control groups eliminate the need for large sample sizes, reducing the number of measurements needed.

All living things maintain an internal balance in their cells as well as with the external environment known as:

• Sensitivity

• Homeostasis

• Reproduction

• Evolution

Tags

NGSS.HS-LS1-3

A student constructs several terrariums like the one shown. Each terrarium is exposed to a different amount of sunlight each day. In order to determine the ideal amount of sunlight, which of the following variables must be held constant?

• type of plants

• wavelengths of sunlight

• amount of sunlight received

• growth rate of plants

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Which data is probably invalid?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The picture shows some containers of different foods that were left in the open for 2 days. Which question could best be answered by this experiment?

• How does a fly digest different foods?

• How much energy do flies get from different foods?

• Which food attracts the most flies?

• Which food attracts flies from the greatest distance?

The most valid and reliable test of this hypothesis would include an experimental group of pine seeds that was recovered from a fire area and pine seeds that were —

• placed in a fire

• found before a fire

• tolerant of fire

• germinated after a fire

Tags

NGSS.MS-LS2-4