The
layer of soil closest to the surface is letter a: O (organic matter). This is
the top, organic layer of soil, mostly composed of unconsolidated mineral , dead
leaves and humus – a decomposed organic matter – which functions as a natural avenue
for growth of land plants.
Aschool principal ordered 1,000 pencils. he gave an equal number to each of 7 teachers untill had given out as many as possibe. how many pencils were left?
What evidence does the writer give to support his argument about coral reefs? a) he speaks of the activities of coral polyps. b) he describes the composition of the great barrier reef. c) he emphasizes the ways in which coral reefs are fragile. d) he points out the ways that scientists do research on the reefs.