The tiger beetle Cicindela oregona  has a distribution that extends from Arizona through the temperate rain forests of Alaska. Why should the amounts of cuticular hydrocarbons vary geographically among populations of C. oregona? Describe how water loss is related to the habitats this beetle is found in. How would you predict the habitat of this beetle changes across this latitudinal range and why?  Explain the relationship between water and temperature regulation in terrestrial organisms?

The three images below are snapshots of the atmospheric CO2 concentration in May, July, and September of a year. To interpret the CO2 concentration: blue/green/yellow indicates lower to medium CO2 concentrations and red/maroon/pink indicates medium-high to highest CO2 concentrations. Question: Which of the phenomena described below best explains why CO2 concentrations are lowest in the summer when compared to the spring or fallI/winter? 2006 / 05 / 09 NASA 2006 / 07 / 12 Canon Den ano n n Cat C m e NASA Global Medeling and Assinilten Offoe Cate ae 2006 / 11 / 13 Gobal Modeling and Assimiation Ofice NASA O Higher rates of plant and algae growth in summer lead to higher photosynthesis rates O Less fossil fuels are emitted by humans in the summer O More cars are driven by humans in the summer O Lower rates of plant and algae growth in summer lead to decreased rates of photosynthesis

What are the three possible biological impacts that climate change is having or could have on lake ecosystems?