When can an ecosystem sometimes repair itself?

after houses are built
after a chemical spill
after natural pollution
after clear cutting a forest

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?

Organisms that successfully adapt will leave to grownone of the above

Which of these substances does not protect against invaders in the nonspecific immune response? a. saliva b. mucus c. tears d. urine