Blood agar is an example of a(n) ________ medium
A) selective
B) general-purpose
C) enrichment
D) differential
Answer: B
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Choose the description below that best matches the current model of RNA polymerase holoenzyme.
A. A core enzyme composed of five sigma factors bound by a polypeptide chain. B. A core enzyme composed of five polypeptides bound by ribosomes. C. An open complex or "bubble" formed by DNA, mRNA, and RNA polymerase. D. A core enzyme composed of five polypeptides bound by a transcription factor.
Evidence that sleep has an inherited component is that
A) MZ twins share more sleep characteristics than do DZ twins. B) siblings often go to sleep and wake up at the same time. C) people with insomnia have the same chromosome abnormality. D) DZ twins share more sleep characteristics than do MZ twins.
Describe four properties of water that make it indispensable for life as we know it on Earth. How do the properties of water arise?
What will be an ideal response?
Nerves send messages to the ______ ______ system
Fill in the blank(s) with the appropriate word(s).