LSAT 105, Section 3, RC Passage 1, Invertebrate Schools

RC Passage 1 Explanation

PASSAGE TEXT: Until recently, many biologists believed that invertebrate "schools" were actually transient assemblages, brought …

Paragraph Summaries

1. Biologists believed invertebrate groupings were random, but new research shows that some form true schools like fish.
2. Schooling invertebrates maintain consistent positions relative to each other, and their internal structure is stable except when faced with predators.
3. Schooling offers protection by reducing a predator’s ability to detect the group and increasing chance of escape.
4. Schools use defense strategies to evade or confuse predators.
5. Schooling also helps with finding food and mates, but competition and resource limitations set an optimal school size.

Analysis

The passage provides evidence against the common belief that invertebrate groupings are random. It’s primarily descriptive and explanatory rather than argumentative.