Which of the following contribute to the successful application of Koch's postulates?
A) The development of the compound microscope.
B) The theory of abiogenesis.
C) The ability to record the appearance of bacteria photographically.
D) The development of simple bacterial staining techniques.
E) The development of techniques for sterile transfer of bacteria.
E
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A gene library from a particular human's retinal cell would be a collection of _____
A) DNAs cut by a restriction enzyme B) plasmids cut by a restriction enzyme C) different DNA fragments ligated into different plasmids D) genes that have been sequenced from a particular organism E) PCR-amplified DNAs
An example of a density-independent factor that affects a population's growth is
A. All of the answer choices are correct. B. frost killing all of your tomato plants. C. a fungus infecting your tomato plants. D. your tomato plants competing for water. E. insects eating your tomato plants.
When bones of a joint slip out of places, it is known as _____
a. a sprain b. a strain c. arthritis d. a dislocation e. a break
Starling's law of the heart states that the heart pumps:a
more forcefully when more blood is delivered to it. b. more rapidly when less blood is delivered to it. c. less forcefully when oxygen-rich blood is delivered to it. d. slower when more blood is delivered to it.
e. slower when norepinephrine is secreted.