Q: Which formula would you use to calculate the mean number of emerging moths in an experiment with multiple replications?

$$\text{Mean} = \frac{\text{Total number of emerging moths}}{\text{Number of replications}}$$

Question 1

Which level of ecological study is best represented by research on how a single zebra regulates its body temperature in the savanna?

Accepted Answer

Organismal ecology

Question 2

A scientist is studying the effect of rainfall on the number of buffalo per square kilometer in the Serengeti. Which abiotic factor is being investigated, and what is the likely relationship?

Accepted Answer

Water; as rainfall increases, buffalo density increases

Question 3

Which of the following best explains why coral reefs are found only in certain regions of the world?

Accepted Answer

Coral reefs are abundant only in warm waters due to temperature effects on coral deposition

Question 4

Which experimental design would best test the hypothesis that predation controls oak winter moth abundance?

Accepted Answer

Remove pupal predators from some areas and compare moth survival to areas where predators remain

Question 5

Which of the following is a likely consequence of acid rain (pH \u003c 5.6) on freshwater fish populations?

Accepted Answer

Decline in fish populations due to increased toxicity of metals

Question 6

Why do red algae thrive at greater depths in aquatic environments compared to green algae?

Accepted Answer

Red algae have pigments that enable them to use blue-green light, which penetrates deeper into water

Question 7

Which of the following best describes the rain shadow effect?

Accepted Answer

Warm, moist air rises up a mountain, cools, and releases precipitation; the leeward side receives little precipitation

Question 8

A population of cyanide-producing white clover is found only in regions where the average winter temperature does not fall below $$0^{\circ}C$. What is the most likely explanation for this distribution?

Accepted Answer

Frost causes cell rupture, releasing cyanide and killing the plant in colder regions

Question 9

Which of the following is an example of convergent evolution?

Accepted Answer

Kangaroo rats in North America and jerboas in central Asia both evolved similar adaptations for desert life

Question 10

Which formula would you use to calculate the mean number of emerging moths in an experiment with multiple replications?

Accepted Answer

$$	ext{Mean} = \frac{	ext{Total number of emerging moths}}{	ext{Number of replications}}$$

Question 11

Which of the following statements about the effect of wind on organisms is correct?

Accepted Answer

Wind amplifies the effects of cool temperatures and increases water loss

Question 12

Why are most aquatic plants limited to the photic zone?

Accepted Answer

Light is absorbed by water, preventing photosynthesis at depths greater than 100 meters

Question 13

Which of the following best describes the relationship between latitude and mean annual temperature?

Accepted Answer

Mean annual temperature decreases as latitude increases

Question 14

A scientist observes that the percentage of parasitism by Cyzenis albicans increases with host density per leaf cluster. What statistical tool can be used to summarize this relationship?

Accepted Answer

A line of best fit

Question 15

Which of the following is a direct effect of high salinity on plant growth?

Accepted Answer

High salinity generally reduces plant growth in terrestrial habitats

Question 16

Which of the following is a correct statement about the effect of pH on ecosystems?

Accepted Answer

pH less than 5.2 prevents nitrifying bacteria from working, reducing soil fertility

Question 17

Which of the following is a real-world application of genetic engineering to improve temperature tolerance in crops?

Accepted Answer

Mutating genes in Pseudomonas syringae to reduce ice nucleation and frost damage in strawberries

Question 18

Which of the following best explains why similar biomes on different continents often have different animal species?

Accepted Answer

Independent evolution of separate, unconnected populations leads to different species in different places

Question 19

Which of the following is NOT a factor that limits the distribution and abundance of a species?

Accepted Answer

Color of the sky

Introduction to Ecology and Biomes: Structure, Methods, and Environmental Influences

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