Regarding studies with infectious agents in animals, as the bsl and absl number increases from 1 to 4, what happens to the containment and safeguard practices?

Work in BSL-4 containment laboratory requires time and great attention. The same work that is done in a BSL-2 laboratory will take significantly longer in a BSL-4 setting. This increased time requirement is due to a lot of factors that are aimed at protecting the worker from laboratory-acquired infections. The BSL 4 laboratory should contain a Class III biological safety cabinet but may use a Class I or II BSC in combination with a positive-pressure, air-supplied full-body suit. Usually, BSL 4 laboratories are in separate buildings. Exhaust streams are filtered through high-efficiency particulate air (HEPA) filters, depending on the agents used.

the answer is z.

the human body has five levels of organization. level 1: cells. cells are the basic units of life and form the first level of organization. cells in the human body have specific functions. examples include nerve cells, blood cells, liver cells, and so on.