The pulmonary arteries and veins are unique in the type of blood they carry.
<span><span>Pulmonary arteries carry blood low in oxygen from the right side of the heart to the lungs and often contain blue latex.</span><span><span>Pulmonary veins </span>carry blood rich in oxygen to the left side of the heart and rarely contain any latex.</span></span>
Answer:
C
Explanation:
Many kinds of air pollution can't be seen, which means A is incorrect. Any kind of pollution can be harmful to you, which means B is incorrect too. Air pollution is very harmful but in most cases can't be directly seen, so C is correct. Pollution can be found everywhere, so D is incorrect also.
Answer:
All of them
Explanation:
The effect may not be real because we don't know if the results are reproducible: Peers can identify flaws in the experimental design because an experiment must have a clear design in order to be reproducible by other researchers or else they would not have scientific validity.
The treatment kills cancer cells, but it might simply be a poison that kills all cells—even normal cells: It is possible that in the design of the experiment carried out only cancer cells were used but it had not been performed in healthy cells, which would imply the possibility that the fungus kills all the cells.
Cell samples were taken from too few patients: This may be another mistake because when only a small sample is analyzed it is not certain if the fungi are the ones that kill the cancer cells or are other conditions of the analyzed patient.
These are called igneous rocks due to them being made from lava from an volcanoe eruption,
