Answer: B
Explanation: Aphthous ulcers are white, round, or oval lesions surrounded by a red halo that appear on the buccal mucosa.
Answer:
Earth's axis always points in the same direction. Because of this, the part of Earth that receives the most direct rays from the Sun changes as the Earth travels around the Sun. At the equinox, the Sun's rays shine most directly on the equator, and the Northern and Southern Hemispheres get the same amount of Sunlight.
Explanation:
C)Neuron... hope it helps :)
Well,i think the answer would be : no symptoms
Symptom is a physical or mental feature that is used as an indicator for the existence of a disease (such as rash, fever, etc)
Those above are simply laboratory facts/data, not symptoms
