The Intergovernmental Panel on Climate Change has concluded that greenhouse gases released into the atmosphere, due to human activities, have affected Earth's climate. Which of the following statements best explains the connection between rising atmospheric concentrations of greenhouse gases and the effects of climate change on ecosystems? A.
Higher levels of methane have caused increased global precipitation.

B.
Higher levels of carbon dioxide have caused a reduction in ocean pH.

C.
Higher levels of methane have caused algal blooms in lakes and streams.

D.
Higher levels of carbon dioxide have caused an increase in global photosynthesis.

Long term exposure to waves can cause sunburns and skin cancer.

Use this dichotomous key for insect identification to identify the insect shown. 1. a. insect has one pair of wings. order diptera b. insect has two pairs of wings. go to #2 2. a. front wings thicker in texture than hind wings go to #3. b. front and hind wings are same texture throughout. go to #4 3. a. front wings are short order dermaptera b. front wings cover entire abdomen order coleoptera 4. a. wings with scale on all parts of their area. order lepidoptera b. wings without scales go to #5. 5. a. hind wings smaller than front wings. order ephemeroptera b. front and hind wings nearly equal in size. order odonata the insect pictured is in the order diptera. ephemeroptera. coleoptera. odonata.

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these