for question 1.) i am pretty sure of answer a.)
for question 2.) the answer is most likely b.)
i would recommend waiting for a second opinion. just to be safe.
Answer:
It encourages the growth of a group of certain bacteria while inhibiting the growth of others. It contains a high concentration (~7.5%-10%) of salt (NaCl), making it selective for gram positive bacteria Staphylococci (and Micrococcaceae) since this level of NaCl is inhibitory to most other bacteria.
Explanation:
B. Lowering taxes in order to stimulate spending. When the economy experiences a downturn, the government is more likely to cut taxes to allow price competitiveness of goods, thereby triggering demand, hence consumption among households. A boost in consumption should translate into an increase in supply that wwould in turn bring about job creation. The negative trend would therefore be reversed.
Since the other answer got deleted, i'll just answer it for you.
a sinoatrial node is the main pacemaker that begins each heartbeat located in the junctions of superior vena cava and the right atrium. It signals from the node that spread through the atria and determines the heart rates.
Gene Therapy is the name of the process.
