What prior knowledge is required to use a phylochip to study the abundance of the different microbes present within a microbial community? How does this cause bias when using a phylochip to analyze microbial community structure?
What will be an ideal response?
Answer: To construct the phylochip, the 16S rRNA nucleotide sequences must be known to detect the microorganisms. Without the 16S rRNA nucleotide sequences, the probes cannot be synthesized. If there are organisms present in the sample that do NOT match the probes on the chip, they will not be detected. This is one bias introduced by a phylochip â€" novel organisms that have not been sequenced will be completely overlooked.
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An energy pyramid shows the ____
a. amount of organic material in the bodies of organisms at each trophic level b. amount of energy that flows through each trophic level c. biomass amount at each trophic level d. amount of energy in an ecosystem, quantified by the base of the pyramid only e. trophic levels that exist in a specific ecosystem
Cells are _____.
A. only found in pairs, because single cells cannot exist independently B. characteristic of prokaryotic and eukaryotic organisms C. characteristic of eukaryotic but not prokaryotic organisms D. limited in size to 200 and 500 micrometers in diameter
In all coelomates, the coelom originates from
A. mesoglea. B. mesoderm. C. ectoderm. D. endoderm.
The reason why some specialty breeds of dogs are more prone to genetic disease is because of genetic
drift.
Indicate whether the statement is true or false.