All of the colonies form on the surface of a spread plate, whereas on a pour plate, colonies may be embedded in the agar as well as on the surface.
Answer the following statement true (T) or false (F)
True
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Which two of the following statements are true regarding the human microbiome?
a. the human microbiota carries many more genes than the human genome b. healthy people harbor potentially dangerous pathogens, but these are in low abundance c. viruses present in healthy humans infect only the microbiota, not the human cells d. many sites of the human body are sterile, notably the lungs and brain.
What is a sigma factor? How does elevated temperature induce transcription of heat shock proteins in bacteria via a sigma factor?
What will be an ideal response?
Which hormone causes contraction of the uterus?
a. cortisol b. oxytocin c. prostaglandins d. progesterone e. estrogen
Homologous chromosomes become attached to either ____ in prophase I.
A. sister B. spindle pole C. nucleus D. chromosome E. chromatid