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Kangaroo rats living in the western American deserts have very efficient kidneys; they excrete an exceedingly small volume of highly-concentrated urine in order not to lose much water from their bodies. If you compare a desert kangaroo rat kidney and a human kidney you would see that the rat kidney […]

Please address the following questions about genomes: 1. Do more complex organisms always have more genes than less complex organisms? Give an example to support your answer. 2. What type of DNA sequences make up the majority of the human genome? 3. How are repeated sequences useful for DNA forensic […]

Q1 Is it possible (economically, socially, environmentally) to have zero emissions of pollutants? What level of risk are you willing to live with? What level of risk are you willing to allow for environmental health? Q2 What would be the consequence to Earth’s ecosystems if the ozone layer were to […]

I. Multiple choice questions. 1. In October of 2003, a raging wildfire swept through the mountain ecosystems in Southern California, burning everything in its path to the ground and driving away all of the animals. In order for the mountain ecosystem to establish itself, which member of the food web […]