Question

1. bait balls are special school formations that have evolved over time.

which of the following best describes the evolutionary purpose of the bait ball and its effect on the sardine population?

a. the bait ball makes sardines more visible to predators, decreasing the sardine survival rate.

b. the previousschool formation was most advantageous, leading to the development of the bait ball

c. the new formation is not effective, leading to extinction of the species

d. the new formation helped increase protection over the regularschool formation, increasing the sardine survival rate.

Explanation:

To determine the correct answer, we analyze each option:

• Option A: Making sardines more visible to predators would decrease survival, but evolutionary adaptations like bait balls typically enhance survival, so A is incorrect.
• Option B: If the previous “school” formation was most advantageous, there would be no need for the bait ball to evolve, so B is illogical.
• Option C: Evolutionary adaptations (like bait balls) are beneficial; a formation leading to extinction would not persist, so C is incorrect.
• Option D: Evolutionary adaptations (like the bait ball) enhance survival. A new formation increasing protection (and survival rate) aligns with evolutionary logic.

Answer:

D. The new formation helped increase protection over the regular 'school' formation, increasing the sardine survival rate.