Which of the labeled structures in the diagram allows bacteria to infect organisms under harsh conditions, such as in the acidic stomach?

Ans.

Bacterial cells are surrounded by a very large structure, known as capsule or slime layer. It is made up of polysaccharides and protect the bacteria from harsh, external conditions, such as antibiotics, acidic conditions, and desiccation. The capsule also enhances the virulence  (disease causing ability) of bacteria. In given diagram, capsule is represented by label (A).

Thus, the labeled structure that protects bacteria and allows it to cause infection in harsh, acidic conditions is (A).

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.

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it