Which of the following statements is FALSE?
a. The 1st principal energy level contains 1 orbital.
b. The 2nd principal energy level contains 4 orbitals.
c. The 1st principal energy level contains a maximum of 2 electrons.
d. The 2nd energy level contains a maximum of 10 electrons.
e. The 2nd energy level contains 1 spherical orbital and 3 dumbbell-shaped orbitals..
D
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Which of the following is(are) true about
predator-prey coevolution? a. Each species exerts selection pressure on the other. b. Predators are selective agents that favor improved prey defenses. c. Prey with better defenses are selective agents that favor better predator hunting skills. d. All of the above are true. e. None of the above are true
Viral chromosomes exist in a variety of conformations and can be made up of ________
A) DNA only B) DNA, RNA, or protein C) protein- or lipid-coding sequences D) DNA or RNA E) RNA only
How many chromosomes are provided to a zygote from each gamete?
A) 23 B) 46 C) 46 pairs D) none of the above
All of the following lipids or lipid components are hydrophobic EXCEPT
A) fatty acid tails. B) saturated fats. C) unsaturated fats. D) waxes. E) fatty acid heads.