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BIO 345 Exam 4 Questions and Answers 100% Pass Which statement is true? A. Humans are the only primates with opposable thumbs B. The great apes, but not other primates, have keratin nails C. Neither are true D. Both are true - C Using the phylogenetic species concept, which of the following ...

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  • March 10, 2025
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  • 2024/2025
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  • BIO 345
  • BIO 345
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BIO 345 Exam 4 Questions and
Answers 100% Pass


Which statement is true?


A. Humans are the only primates with opposable thumbs


B. The great apes, but not other primates, have keratin nails


C. Neither are true


D. Both are true - ✔✔C


Using the phylogenetic species concept, which of the following would

distinguish humans as a species separate from other great apes?


A. Hybrids do not form


B. Red hair


C. Male-dominated societies




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,D. All of the above


E. None of the above - ✔✔E


In species with sexual dimorphism, which sex tends to be dull looking?


A. Males


B. Females


C. Both equally - ✔✔B


In animals with sexual dimorphism, which sex tends to be larger?


A. Males


B. Females


C. Both equally - ✔✔B


In mammals with sexual dimorphism, which sex tends to be larger?


A. Males


B. Females


C. Both equally - ✔✔A




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,Which of the following is/are true regarding traits?


A. All traits arise through natural selection


B. All traits increase fitness


C. Traits can arise as an indirect byproduct of another trait


D. Both A and B


E. All of the above - ✔✔C


An organism that is associated with another in a mutually beneficial

relationship is known as a(n):


A. Antagonist


B. Symbiont


C. Mutualist


D. Cospecies - ✔✔B


Coevolution can be:


A. Mutualistic


B. Divergent


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, C. Antagonistic


D. Both A and C


E. All of the above - ✔✔D


The Red Queen Hypothesis states that organisms must constantly evolve in

order to:


A. Increase cellular complexity


B. Gain a reproductive advantage within populations


C. Survive against ever-evolving competitors


D. Both B and C (correct answer)


E. None of the above - ✔✔D


Exaggerated traits in sexually dimorphic organisms tend to:


A. Decrease survival


B. Increase survival


C. Decrease fitness


D. Increase both survival and fitness


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