Can you envisage a Winogradsky column consisting of only Gram-negative bacteria (or just Gram-positives, for that matter)?
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Talmudic Question #173
Talmudic Question #172
Can you think of a vertebrate other than ruminants that CANNOT be reared under germ-free conditions?
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Talmudic Question #171
by Ellie Arrington
Why are Gammaproteobacteria the weeds of microbial communities?
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Talmudic Question #170
Why is RNA replication limited to the viruses and viroids?
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Talmudic Question #169
Lactose is rarely found in Nature except for mammalian milk. How come?
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Talmudic Question #168
Are there classes of genes that cannot be productively transmitted by phages (that is, cannot be transduced)?
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Talmudic Question #167
What is a microbe? (Defend your definition.)
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Talmudic Question #166
Why haven’t eukaryotes developed a CRISPR system? (the immune system doesn’t count)
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Talmudic Question #165
Describe the properties of a yet-to-arise new DOMAIN of life.
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Talmudic Question #164
On Earth, L-amino acids in proteins go with D-ribo- or D-deoxyribo-nucleotides. At which point in time during the evolution of living systems was the decision made to make use of only one of the enantiomer pairs?
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