Question 1

In the ant navigation experiment, what was the primary hypothesis (H1) being tested?

Accepted Answer

Desert ants keep track of stride number and length to estimate how far they are from the nest.

Question 2

Which of the following best describes the control group in the ant navigation experiment?

Accepted Answer

Ants left alone with normal legs.

Question 3

Why is it important to include a control group in a well-designed experiment?

Accepted Answer

To ensure that the results are due to the manipulated variable and not other factors.

Question 4

If the null hypothesis in the ant experiment is true, what would you expect to observe?

Accepted Answer

No differences in homing distance among the three groups of ants.

Question 5

A box-and-whisker plot is used to represent data distribution. What does the box represent?

Accepted Answer

The interquartile range (middle 50% of the data).

Question 6

In hypothesis testing, what does a p-value less than 0.05 indicate?

Accepted Answer

The results are statistically significant and the null hypothesis can be rejected.

Question 7

Which of the following is a key feature of a well-designed experiment?

Accepted Answer

Including a control group and standardizing experimental conditions.

Question 8

A bar chart is most appropriate for displaying which type of data?

Accepted Answer

Categorical data comparing different treatments.

Question 9

Suppose you are analyzing a graph where the x-axis represents 'Generation' and the y-axis represents '% Protein in Corn Kernels.' What is the independent variable?

Accepted Answer

Generation

Question 10

If a histogram is used to display data, what does the height of each bar represent?

Accepted Answer

The frequency or proportion of observations within a range.

Question 11

In the ant experiment, if ants with longer legs (stilts) overshoot the nest, what does this suggest about their navigation mechanism?

Accepted Answer

They rely on stride length and number to estimate distance.

Question 12

Which of the following best explains why standard error bars get smaller as sample size increases?

Accepted Answer

Larger samples reduce the variability of the mean estimate.

Question 13

A researcher wants to test if birds sing more during the hottest part of the day to avoid being caught by predators. Which of the following is the best experimental design?

Accepted Answer

Observe bird singing at different times of day, controlling for predator presence.

Question 14

Which of the following equations correctly represents the calculation of standard error (SE) for a sample mean?

Accepted Answer

$$SE = \frac{s}{\sqrt{n}}$$

Question 15

If a box plot shows a median value much closer to the lower quartile than the upper quartile, what does this indicate about the data distribution?

Accepted Answer

The data are skewed toward higher values.

Question 16

In a Punnett square, what does each box represent?

Accepted Answer

A possible genotype of the offspring.

Question 17

Which of the following is an example of a null hypothesis?

Accepted Answer

There is no difference in plant growth between plants given fertilizer and those not given fertilizer.

Question 18

A scientist calculates a p-value of 0.03 when comparing two treatments. What should they conclude?

Accepted Answer

There is a statistically significant difference between the treatments.

Question 19

Which of the following best describes the relationship between the number of generations and % protein in corn kernels, as shown in the provided graph?

Accepted Answer

As the number of generations increases, the % protein in corn kernels generally increases.

Question 20

Which of the following is NOT a reason to repeat an experiment with multiple individuals per treatment group?

Accepted Answer

To make the experiment more difficult to analyze.

Experimental Design, Data Analysis, and Hypothesis Testing in General Biology

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