Soil degradation is primarily attributed to:
A. wildfires, surplus soil organisms and dense vegetation.
B. poor agricultural practices, overgrazing and deforestation.
C. erosion, excessive tillage and coastal location.
D. exhaustion of parent material, severe climate and leaching.
E. heavy rainfall, agroforestry and crop rotation.

What is the sequence of amino acids corresponds with the rna strand ucg ggg cac

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

1) strawberry plants typically reproduce by making runners, which are miniature versions of themselves, that grow off of the roots and stems of the parent. this type of vegetative reproduction is known as a) pollination. b) fragmentation. c) binary fission. d) vegetative propogation.