**Core Concept**
The question requires knowledge of the morphological characteristics of bacteria on culture media. The appearance of "bisected pearls" is a distinctive feature associated with a specific type of bacterial colony morphology.

**Why the Correct Answer is Right**
The correct answer refers to the bacteria *Streptococcus pneumoniae*. When cultured on blood agar, *S. pneumoniae* exhibits a characteristic "bisected pearl" or "doughnut" appearance. This is due to the presence of an alpha-hemolysin, which creates a clear area (the "ring") around the bacterial colony, while the center remains intact. The bisected pearl appearance is a key diagnostic feature of *S. pneumoniae*.

**Why Each Wrong Option is Incorrect**
*Option A:* Incorrect, as *Haemophilus influenzae* typically exhibits a small, grayish, and non-lactose-fermenting colony on chocolate agar.
*Option B:* Incorrect, as *Neisseria meningitidis* forms small, grayish, and oxidase-positive colonies on blood agar.
*Option C:* Incorrect, as *Staphylococcus aureus* typically forms golden-yellow colonies with a characteristic "bulla" or "umbilication" on blood agar.

**Clinical Pearl / High-Yield Fact**
*Streptococcus pneumoniae* is a significant human pathogen, particularly in cases of pneumonia, meningitis, and otitis media. The bisected pearl appearance on culture medium is a key diagnostic feature that can help distinguish *S. pneumoniae* from other streptococci.

**Correct Answer: D. Streptococcus pneumoniae**