Question
Scientists studying ground finches (Geospiza fortis) on the island of Daphne Major in Galapagos found great differences in the shapes of the beaks.
What is the explanation for this variation in beak shape between the birds?
A. Ground finches grow larger beaks if there is competition for food.
B. They belong to different species.
C. They are adapted for different diets.
D. The more a beak is used by a ground finch, the larger it becomes.
▶️Answer/Explanation
Ans: C
Question
Balkan green lizards, Lacerta trilineata, living in mainland Greece eat mostly insects but also small amounts of plants. The same species living on Greek islands (where insects are scarce) show a greater percentage of those physical traits useful for eating plants than the mainland lizards.
What is the biological explanation for these observations?
A. Variation in each lizard population allowed adaptation to occur.
B. Lizards migrated to areas where they were better adapted.
C. Lizards on the islands diverged due to lack of interbreeding with the mainland population.
D. Homologous structures have prevented separate species from evolving.
▶️Answer/Explanation
Ans: C
Question
What is the reason for antibiotics not damaging human cells?
A. The dose is too small to be harmful.
B. The dose is taken for only a short time.
C. Antibiotics occur naturally in humans.
D. Human metabolism is different from bacterial metabolism.
▶️Answer/Explanation
Ans: D