Most people on earth rarely experience an episode of infectious disease
true
false

Causation can be proved by using an

An 81-year-old man and avid reader had a mild stroke from which he eventually recovered. he did have some residual signs and symptoms, however, such as: - right-sided homonymous hemianopia (i. e. loss of vision on the right half of the visual field in each eye) - alexia ("dyslexia"), the inability to read, which greatly frustrated this man - loss of sensation on the skin on the right side of the body why was this man unable to see the right half of his field of vision?

During the first month of development, how many layers of cells make up the embryo? a. 1 b. 2 c. 3 d. 4