1. Photosynthesis in the Earth's forests produces about half of the oxygen in the atmosphere. Photosynthesis in the Earth's oceans produces the other half of the oxygen in
the atmosphere. Why do you think so much photosynthesis occurs in the oceans? Think
about what type of organisms perform photosynthesis. (8 points)
2. The rain forests of South America are very active photosynthetic zones. Although plants
around the world use photosynthesis, these areas are more productive than other parts of
the planet.
a) About half of the forests that covered the Earth in the early 1900s have been cut down.
Discuss the impact this has on carbon dioxide levels in the atmosphere. Support your
answer.

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

answer; i believe that the correct answer is (lung);

homeostasis is the tendency towards a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes. and this is how it applies to the integumentary system. back to top. skin functions in homeostasis include protection, regulation of body temperature, sensory reception, water balance, synthesis of vitamins and hormones, and absorption of materials. when body temperature falls, the sweat glands constrict and sweat production decreases.