Principles Of Biology 1 (Climate Change)

6. Why is ocean acidification problematic for some marine life?

Answer: It decreases the amount of carbonate in the oceans, making the creation of shells and other hard structures difficult for marine life.

5. How does climate change affect earth's oceans?

Answer: The pH level of the ocean will shift to a more acidic environment, leading to stress and the possible extinction of many species of shellfish and corals.

10. The light reactions of photosynthesis occur within the _____ of the chloroplast and the Calvin cycle reactions occur within the _____ of the chloroplast.

Answer: Thylakoid, Stroma.

1. Place the following levels of biological organization in order, with the smallest, least inclusive level first.

Answer: 1. Species, 2. Population, 3. Community, 4. Ecosystem, 5. Biosphere.

7. As global temperatures increase, which of the following scenarios is most likely to happen.

Answer: Glaciers and snow coverage decrease.

8. A product of photosynthesis, _____ is a carbon-based molecule that is the chief source of energy for most organisms.

Answer: Glucose.

9. Photosynthesis takes carbon from reservoirs in the atmosphere and uses it to form _____, the energy source for all animals on earth.

Answer: Glucose.

4. How do greenhouse gases cause climate warming?

Answer: Greenhouse gases prevent radiation of infrared energy back into space, trapping the heat near the earth's surface and causing the climate too warm.

2. Over the past several decades, the overall trend for earth's temperatures has been.

Answer: Increases in overall global temperatures at an accelerating rate, a phenomenon known as global warming.

3. The greenhouse effect.

Answer: Is caused by gases such as carbon dioxide trapping heat in the earth's atmosphere.