In a study of tree dispersion in a forest, we divided the forest into 1 sq km grid cells, choose 50 of them at random, and counted the number of trees in each cell. The means to variance ratio of the counts of trees per cell was much less than 1. What does this tell us about the spatial distribution of the trees?

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#Question id: 12582

#Section 5: Applied Ecology & Evolution

Which of  the  following  describes carbon dioxide,  methane, and  water  vapor re-reflecting infrared radiation back toward Earth?

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#Question id: 16890

#Section 3: Mathematics and Quantitative Ecology

A test of H0: μ = 0 versus Ha: μ > 0 is conducted on the same population independently by two different researchers. They both use the same sample size and the same value of α = 0.05. Which of the following will be the same for both researchers?

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#Question id: 12580

#Section 5: Applied Ecology & Evolution

When levels of CO2 are experimentally increased, C3 plants generally respond with a greater increase in productivity than C4 plants. This is because

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#Question id: 11921

#Section 1: Ecology

Which of the following would be considered to be a natural population in a pond? 

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#Question id: 8915

#Section 2: Evolution

The number of legs an insect has, the number of vertebrae in a vertebral column, or the number of joints in a digit (such as a finger) are all strongly influenced by