Question

1. bacteria can be classified by shape. for the following bacteria species, give their basic bacterial shape.

streptococcus pyogenes:
paenibacillus polymyxa:
aquaspirillum bengal:

Explanation:

• Streptococcus pyogenes: Bacteria of the genus Streptococcus are typically spherical (coccus - shaped) and often form chains (the "strepto - " prefix indicates chaining). So its shape is coccus (or spherical, often in chains).
• Paenibacillus polymyxa: Bacteria of the genus Paenibacillus are rod - shaped (bacillus - shaped). They can sometimes form endospores and have a rod - like morphology.
• Aquaspirillum bengal: Bacteria of the genus Aquaspirillum are spiral - shaped (spirillum - shaped). The "spirillum" in the genus name hints at their spiral morphology.

Answer:

• Streptococcus pyogenes: Coccus (spherical, often in chains)
• Paenibacillus polymyxa: Bacillus (rod - shaped)
• Aquaspirillum bengal: Spirillum (spiral - shaped)