Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Nutrient agar and
Transcribed Image Text:**Title: Understanding Bacillus anthracis: Culture and Microscopy**
**Image Descriptions:**
1. **Left Image - Bacillus anthracis Culture:**
- The image displays a Petri dish containing a cultured sample of *Bacillus anthracis*.
- The bacterial colonies appear as white, irregularly shaped formations, arranged in streak patterns across the agar medium. The streaking technique suggests an attempt to isolate and grow individual colonies for further analysis.
2. **Right Image - Bacillus anthracis Under Microscope:**
- The microscopic image shows rod-shaped bacteria, characteristic of *Bacillus anthracis*.
- The bacteria are stained to appear as purple, chain-like structures, indicating their endospore-forming ability. Each rod represents a bacterial cell, and their arrangement in chains is typical for this species.
**Educational Context:**
*Bacillus anthracis* is a gram-positive, spore-forming bacterium known for causing the disease anthrax. It is typically found in soil and can form dormant spores that survive in harsh conditions. The left image illustrates the appearance of *Bacillus anthracis* when cultured in a laboratory setting, while the right image reveals its distinct morphology under a microscope. Understanding the growth characteristics and microscopic features of this bacterium is crucial for its identification and study in microbiology.
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