How many Biosafety Levels have been created to outline recommended biocontainment practices and laboratory design considerations

Based on the phylogenetic chart, which three statements are true about the relationship between the organisms? a human is more closely related to a mouse than a kangaroo.a platypus is more closely related to kangaroo than a mouse.a human and a kangaroo share common features because of a common ancestor.a platypus and a mouse are more closely related than a platypus and a kangaroo.a kangaroo and a mouse are more closely related than a mouse and a human.

Describe how a student should adjust the microscope to see the cells on a slide more clearly?

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?