Which cancer may be suspected when a woman has vaginal bleeding during times in the menstrual cycle other than her period, or after menopause?
A. Ovarian
B. Endometrial
C. Cervical
D. Rectal
B. Endometrial
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What do scientists attribute to the remarkable survival abilities of the tardigrades?
a. like a virus, they are not truly alive b. the ability to mutate their DNA intentionally c. unique protective proteins that replace the water in their cells d. they are alien life visiting this planet
The red-cockaded woodpecker that builds nests mainly in one type of tree that is of a certain age is a(n)
____________________ species. Fill in the blank(s) with the appropriate word(s).
A strain of Drosophila known as dunce produces one-half the amount of cAMP phosphodiesterase found in wild-type flies, which causes a learning defect
Another strain of Drosophila known as rutabaga produces a defective adenylyl cyclase protein (one of the AC types expressed in most cells) and also causes a learning defect. A dunce–rutabaga double mutant fly has relatively normal learning. Explain these curious observations. What will be an ideal response?
In which metabolic process is water produced?