The authors of the article “Age, Spacing and Growth Rate

The authors of the article “Age, Spacing and Growth Rate of Tamarix as an Indication of Lake Boundary Fluctuations at Sebkhet Kelbia, Tunisia” ( Journal of Arid Environments [1982]: 43–5 1) used a sim...

The production of pups and their survival are the most significant factors

The production of pups and their survival are the most significant factors contributing to gray wolf population growth. The causes of early pup mortality are unknown, and difficult to observe. The pup...

The sand scorpion is a predator that always hunts from a motionless

The sand scorpion is a predator that always hunts from a motionless resting position outside its own burrow. When prey appears on the horizon, within say 20 cm, the scorpion assumes an alert posture;...

Models of climate change predict that global temperatures and precipitation will increase

Models of climate change predict that global temperatures and precipitation will increase in the next 100 years, with the largest changes occurring during winter in northern latitudes. Researchers rec...

Carbon acrosols have been identified as a contributing factor in a number

Carbon acrosols have been identified as a contributing factor in a number of air quality problems. In a chemical analysis of diesel engine exhaust, x = mass (mg/cm2) and y = elemental carbon (mg/cm2)...

Investigators in northern Alaska periodically monitored radio collared wolves in 25 wolf

Investigators in northern Alaska periodically monitored radio collared wolves in 25 wolf packs over 4 years, keeping track of the packs’ home ranges (“population dynamics and harvest characteristics o...

The accompanying scatterplot, based on 34 sediment samples with x =

The accompanying scatterplot, based on 34 sediment samples with x = sediment depth (cm) and y = oil and grease content (mg/kg), appeared in the article “mined land reclamation using polluted urban nav...

Exercise 15.21 gave data on x = nerve firing frequency

Exercise 15.21 gave data on x = nerve firing frequency and y = pleasantness rating when nerves were stimulated by a light brushing stoke on the forearm. The x values and the corresponding residuals fr...

In the study described in Exercise 15.31, the effect

In the study described in Exercise 15.31, the effect of latitude on mean clutch size was investigated. Data from various locations in Florida, Georgia, Alabama, and Mississippi on y = mean clutch size...

Models of climate change predict that global temperatures and precipitation will increase

Models of climate change predict that global temperatures and precipitation will increase in the next 100 years, with the largest changes occurring during winter in northern latitudes. Researchers gat...