Answer:
What the scientist is doing incorrectly is disposing of a chemical or biological waste in the common sewer.
Explanation:
One of the most important biosecurity measures is the proper disposal of chemical and biological waste. What the shown scientist is doing incorrectly is disposing of potentially harmful substances in a normal sewer.
<h3>What could he do to make their work in the lab safer?
</h3>
The main thing that must be done to maintain a safe laboratory is to perform proper disposal of chemical or biological waste, which must be placed in airtight containers and transported to a location for safe disposal.
- <em>Chemical waste is usually taken to a landfill where it can be neutralized.
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- <em>Biological waste is transported to incinerators for complete disposal.
</em>
<h3>Why is it important to follow these procedures?
</h3>
Following these procedures is important to avoid chemical or biological contamination of both the environment and people.
<span>The filament of a flagellum rotates in a kind of sinusoidal motion, resembling a ship’s propeller or a corkscrew. Since the flagellum pushes instead of pulls, it is located at the rear of the microorganism. If there is more than one, they may act as a bundle. The direction of rotation determines the path of the microorganism. Flagella also serve as sensors, particularly for the detection of moisture.</span>
Physical exercise preserves bone mass. Measurements of bone biomarkers may reflect the events in bone during exercise. Fifteen healthy, well-trained individuals (7 men and 8 women) performed a running test for 21 min until exhaustion. Venous blood samples were drawn before and 30 min after the exercise to measure the levels of osteocalcin, the carboxyterminal propeptide of type I procollagen (PICP) and the carboxyterminal cross-linked telopeptide of type I collagen (ICTP). After exercise, the women had a marked increase in serum osteocalcin concentrations (from 7.5±5.0 μg/1 to 11.5±3.0 μg/1), whereas the level was unaffected in the men (from 14.5±3.0 μg/1 to 13.5±4.6 μg/l). In the men there was a marked increase in PICP (from 240±47 μg/1 to 268±56 μg/1) that was not seen in the women (from 244±70 μg/1 to 253±60 μg/1). In neither group did ICTP levels change. In conclusion, significant responses were seen in PICP and osteocalcin during exercise, indicating that such measurements may be valuable for the further delineation of the effects of physical activity on bone. Furthermore, the different responses in men and women point to interesting areas for future studies.
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