From its atomic number of 15, it is possible to predict that the phosphorus atom has _____
A) 5 neutrons, 5 protons, and 5 electrons
B) 15 neutrons and 15 protons
C) 8 electrons in its outermost electron shell
D) 15 protons and 15 electrons
D
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Water leaving an efficient wastewater treatment facility ideally has a biochemical oxygen demand (BOD) between ________ units
A) 50 and 100 B) 25 and 50 C) 5 and 25 D) 0 and 5
In humans, crossing over ________
a. occurs at least once per chromosome b. is exceedingly rare c. occurs 46-95 times per chromosome d. never happens
Judah Folkman used which experimental model system to explore the relationship between tumor growth and angiogenesis?
A) a rabbit eye B) the colon C) bone marrow D) mouse skin E) in vitro cells
In one type cross of black × black, the results were as follows: 9/16 black 4/16 yellow 3/16 brown The genotype aabb must result in which of the following?
A) Black B) Brown C) Yellow D) A lethal result