The health, management and conservation of biodiversity, is a challenge facing ecosystems worldwide. The major factors that affect the health and function of the Great Barrier Reef are climate change and pollution. Which question investigates the effects
of a biotic factor on the reef ecosystem?
A)
How do calcium levels affect the habitat of stony corals?
B)
How do nitrogen levels affect the amount of algae in the reef?
How does the number of predators affect the lion fish population?
D
How does water temperature affect the reproduction rate of coral?

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.

Which statements describe resources? one of the factors people use when deciding where they will live is the availability of resources. renewable resources have little value for people. resources are unevenly distributed throughout the world. energy is the world resource which has the highest use. the use of nonrenewable resources has decreased in recent history. the use of resources is evenly distributed throughout the world. the world's oil supply will last for the next forty years if its use continues as expected.

Which of the following is the source of energy for photosynthesis? a.) glucose b.) chlorophyll c.) carbon dioxide d.) sunlight