Answer:
B. the wind tunnel must be run by highly skilled workers.
correct me po if imma wrong ^-^
The oxygen that goes through alveoli and diffuses into blood capillaries. The oxygenated blood goes though aorta and is pumped by the heart and goes out through the vena cava to be distributed to the whole body. the deoxygenated blood comes back to the heart from the body and is pumped back towards the lungs. the carbon dioxide diffuses out of the blood capillaries and goes out of the body.
The presence of sea-dwelling organism fossils indicate that, at one time, the area was under water.
<span>During protein synthesis the exons are joined together to form a sequence of for a functional protein.
Before the mRNA can undergo the process of translation in the cytoplams it undergoes a process called RNA splicing. This process produces a 'final draft' of the mRNA before translation gets under way. The process involves the removal of introns (non-coding sequences) and joining of exons in eukaryotic mRNA.</span>
