Assertion (A): Bacteria produced as a result of asexual reproduction would be similar.

Reason (R): There would be only minor differences between the bacteria generated due to small inaccuracies in DNA replication.

The chapter explains: "No bio-chemical reaction is absolutely reliable. Therefore, it is only to be expected that the process of copying the DNA will have some variations each time. As a result, the DNA copies generated will be similar, but may not be identical to the original." This directly supports Assertion (A) — bacteria produced asexually are broadly similar to the parent and to each other, since asexual reproduction (fission) involves a single parent copying its own DNA. Reason (R) correctly explains why they are similar-but-not-identical: DNA copying, though precise, has small inaccuracies each generation, producing only minor variations rather than drastic differences. Since R correctly explains why A is true (similarity persists because inaccuracies are only minor), option (A) is correct.

Why the distractors fail: (B) is wrong because R does in fact correctly explain A — the minor nature of the copying errors is precisely why the offspring remain similar rather than becoming widely different. (C) is wrong because R is true, not false — the text explicitly states DNA copying has "some variations" that are generally small, not drastic, in each replication event. (D) is wrong because A is true, not false — bacteria from asexual reproduction are indeed similar to one another, as they arise from copying a single organism's DNA.