I am not sure how this is a questions but the explanation is correct.
The correct answer is true.
Negative staining is often used in diagnostic microscopy and it is the opposite of positive staining where the specimen is stained and background not.
Negative staining is used for the bacteria that are difficult to stain such as Spirilla. It is also used for the study of the morphological shape, size and arrangement of the cells that are too delicate to be heat-fixed.
Answer:
yes, because:
No use of toxic and persistent pesticides and fertilizers
No use of genetically engineered—or modified—organisms
Healthier soil through organic farming practices such as crop rotation, pasture grazing and mulch
Organic meats don’t contain any growth hormones
Animals raised organically aren’t given any antibiotics
Organic soil better conserves water, fosters biodiversity, combats erosion and mitigates climate change for significant environmental gains
Answer:
As brain and heart are vital organ they affected negatively when oxygen is lower as they generally require a lot of energy by oxidizing the glucose available so if oxygen is lower glucose available can't be well utilized thus lower energy and poor performance