College-Level Biology 2 Questions Honors Section
Explain your answer in some depth and avoid just saying "It is A" or It is B. Defend your answer and explain why you choice that answer choice.
Question: If the tilt of Earth's axis were 33.5° instead of 23.5°, how might seasons be different than they are now?
Group of answer choices
A) There would likely be no change.
B) They would be less pronounced in both hemispheres.
C) They would be longer in the Northern Hemisphere and shorter in the Southern Hemisphere.
D) They would be more pronounced in both hemispheres.
E) They would be shorter in the Northern Hemisphere and longer in the Southern Hemisphere.
Question: Domestic dogs would least likely meet the definition of a single species using which concept?
Group of answer choices
A) Lineage
B) Biological
C) Morphological
D) Domestic dogs are not a single species according to any of the species concept definitions.
Question: Suppose that two populations that were once isolated come into contact. Which result would not be likely?
Group of answer choices
A) Interbreeding between the two populations if reproductive isolation is not complete
B) Little reinforcement of prezygotic barriers if the hybrids are unfit
C) The development of hybrid zones that last for long periods of time
D) Spread of hybrids through both populations if the hybrids are fit, resulting in gene flow between them
E) A lack of interbreeding if reproductive isolation had been established before contact
Question: Which would be an example of two populations considered separate species based on the lineage species concept?
Group of answer choices
A) Two squirrel populations in which one was red and the other was brown
B) Two warbler populations in which the females strongly prefer to mate with males of the same population
C) Two plant populations that are capable of producing fertile hybrids
D) Two dragonfly populations that have accumulated several differences in their DNA sequences
Question: Which mechanism can lead to selection against hybridization?
Group of answer choices
A) Hybrid sterility
B) Mechanical isolation
C) Gametic isolation
D) Temporal isolation
E) Behavioral isolation
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