How are agar plates inoculated for disk diffusion testing of antiseptics and disinfectants?
A four-way quadrant streak is done using a swab.
A swab is used to inoculate the entire surface of the plate, producing a lawn of growth.
A loop is used to prepare a 4-way quadrant streak.
A loop is used to prepare a lawn of growth by inoculating the entire surface of the plate.
A swab is used to inoculate the entire surface of the plate, producing a lawn of growth.
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Which of the following statements about hemoglobin is false?
A. Hemoglobin is only found within blood cells in animal bodies. B. Hemoglobin increases the amount of oxygen in vertebrate blood one hundredfold. C. The similarity of vertebrate and invertebrate hemoglobins suggest that a shared form of hemoglobin evolved in a common ancestor of these lineages. D. Some plants use hemoglobin to bind oxygen in order to keep cellular concentrations low. E. All of the answer options are correct.
When ciliary action in the lungs is interfered with and mucus builds up, which disease may develop?
a. emphysema b. bronchitis c. pleurisy d. pneumothorax e. tuberculosis
When examining a five-carbon sugar to determine if it is ribose or deoxyribose, one looks to see if there are two H on the ________ carbon in the structure
A) 1' B) 2' C) 3' D) 4' E) 5'
Imagine that you are studying a mammal with a mutation that prevented the growth of hair. What issues do you predict would be problematic for this animal as a result of lacking hair? Check all that apply.
_____ retaining body heat _____ sensing environmental changes _____ hiding from predators _____ defense against predators _____ ability to digest plants