A. Organisms with less desirable traits do not reproduce
is the answer
Chemical factors: This is due to internal stimuli. Changes in the blood such as decrease in O2, increase in CO2 and decrease in PH cause impulse in the carotid artery which stimulates the respiratory centers in the medulla and cause breathing.
Mechanical factors: also called external stimuli. Compression of the fetal chest during delivery forces small amount of lung fluid out of the lungs. This increase in pressure in the chest draws air into the lungs.
A food establishment
is an operation that stores, prepares, packages, serves, vends, delivers
or otherwise produces food for human consumption. Food that is offered in food establishments
should come from local-approved food sources. They can use produce that they
grow themselves or from agricultural producers that should be licensed and are responsible
to assure that their produce is safe (complying applicable laws). The producer
has to have a United States Department of Agriculture inspected plant. Food
establishments should obtain produce from those who have been certified in Good
Agricultural Practices and Good Handling Practices.
Answer:
DNA extraction methods cannot be directly applied to RNA as RNA is structurally very different from DNA. RNA is single-stranded, while DNA is mostly double-stranded. It is often difficult to isolate intact RNA. ... RNA isolation therefore requires cautious handling of samples and good aseptic techniques.
