Populations of Caribbean coral have decreased significantly over the past 30 years due to disease. Which of the following is most likely a major factor leading to the increased amount of disease in the coral? A Symbiotic algae are living in the coral cells.
B Several different species of fish live on the coral reefs.
C Levels of spawning have decreased and lowered reproductive rates.
D Water temperatures have increased and favored the growth of microorganisms.

Carbon-14 has a half-life of 5,730 years and most igneous rock is older than that.

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.