Koch's postulates are criteria used to establish that

A) A specific microbe should be classified in a specific kingdom
B) A specific microbe is the cause of a specific disease
C) Microbes can be used to clean up toxic spills
D) Microbes are found on dust particles
E) Life-forms can only arise from preexisting life-forms


B) A specific microbe is the cause of a specific disease

Biology & Microbiology

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A collective term for all plant tissues outside the vascular cambium is

A. wood. B. leaf. C. cork cambium. D. bark. E. mesophyll tissue.

Biology & Microbiology

From DNA x-ray diffraction data, it was determined that _____

a. the amount of adenine equaled the amount of thymine b. different species have different proportions of adenine and guanine c. nitrogen containing bases were arranged on the outside of the double helix structure d. the shape of the molecule could be a double helix e. the backbone of the double helix was held together by hydrogen bonds

Biology & Microbiology

What is aseptic technique and why is it important? What are some sources of contamination in the lab?

What will be an ideal response?

Biology & Microbiology

Maintaining the ozone layer is crucial for life because ozone

A) blocks low-energy infrared radiation. B) absorbs visible light. C) absorbs low-energy UV radiation. D) absorbs high-energy UV radiation. E) blocks high-energy infrared radiation.

Biology & Microbiology