In general, what is the effect of histone acetylation and DNA methylation on gene expression?
February 15, 2016 Ecosystem Ecology The integrated study of biotic and abiotic components of ecosystems and their interactions within an ecosystem framework. Human activity can alter ecosystems o Connecticut River Basin o Settlement and development of area o Nitrogen content in water increased o Purity of water is measured by the amount of nitrogen it contains Agriculture Sewage o 1972 water act—no pollution should be seen in the water in this country. Sewage treatments, etc., so the nitrogen levels in the water started coming down. Biosphere o All organisms and nonliving environment o It includes the rocks,