Humus is: 1)the artificial fertilizer applied to monocultures

2)composed of organic compounds and increases the water-holding capacity of soils

3)one of the primary causes of desertification if present in excess

4) promotes eutrophication when agricultural practices allow it to get into waterways

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.

Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated