'Meticulous' means showing great attention to detail; very careful and precise. 'Precise' is the closest synonym among the options. 'Abhorrent' means hateful, 'heedless' means careless, 'incautious' means rash.

Plasmids are extrachromosomal DNA elements that replicate independently; the chromosome does not depend on them. They carry non-essential genes (e.g., antibiotic resistance).

Polarization is one of the key ways in which language fails as a communication tool. The textbook explains that languages typically offer binary or extreme descriptors — good or bad, yes or no, right or wrong — when reality is usually a complex continuum. Examples:

• A person is called “good” or “bad” — but in reality most people have both qualities
• At elections, you vote yes or no to a candidate's entire platform — but you may agree with some policies and disagree with others
• You call a film “good” or “bad” — but you might love the music and hate the direction

Polarized language forces communicators to take extreme positions that do not reflect their actual nuanced views. This distorts communication, causes people to make and then over-defend oversimplified judgments, and is a significant barrier to productive dialogue — especially in political and social discourse in mass media.

The stability of carbocations follows the order: $3^{\circ} > 2^{\circ} > 1^{\circ} > \text{methyl}$.

• $(CH_{3})_{3}C^{+}$ is a tertiary ($3^{\circ}$) carbocation. It is the most stable due to the maximum inductive effect (+I) and hyperconjugation from the nine $\alpha$-hydrogens[cite: 3, 49].