You
are
advised to wear mask, use
hand sanitizer
and follow social distanceing. why?

to avoid transmission of the virus corona

To avoid contracting the virus

And to avoid transmission of the virus

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.