What is the source of the large dust shells seen around some red giants and red supergiants?
A) Leftover material from their formation
B) Debris left behind by a supernova
C) Material from winds from these same stars
D) Debris left behind by passing comets
E) Star-forming molecular clouds
Question 2
Sunspots are dark splotches on the Sun. Which statement is true?
A) They are hotter than the surrounding areas of the Sun.
B) They are extremely cold objects, as cold as Pluto.
C) They are extremely hot, but cooler than the surrounding areas of the Sun.
D) They are solid bodies floating on the surface of the Sun.
E) They are associated with areas of very low magnetic fields.
Prostate cancer. In this example, a large mass has grown into the urinary bladder. Prostate cancer i
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Lilly Martin Spencer’s Young Husband: First Marketing (1854). Note that passers-by are amused at thi
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Anatomy of the Large Intestine (colon)