Micro Test 2 HW

Microbial diversity is thought of in terms of phylogenetic diversity and functional diversity because _____________.

Similar functional traits are often found in divergent phylogenetic groups

Metagenomics involves the analysis of a microbial community by ______________.

Sampling and sequencing all the genes in an environment

The pan genome of a microbial species is constantly changing because of ______________.

Horizontal gene transfer

The phylogenetic analysis of complex microbial communities often target small subunits (SSU) ribosomal RNA genes. This is because rRNA is found in all organisms and __________.

Is highly conserved over evolutionary times

As oxygen appeared in the atmosphere, _________ accumulated, which formed a protective barrier that protects the Earth from ____________.

Ozone / UV radiation

Dissimilatory sulfieozidizers use a variety of unique ecological strategies in order to ______.

Position themselves at interfaces where sulfide and oxygen met

Why phylum harbors the MOST functional diversity observed and has the MOST cultured representatives?

Proteobacteria

Most methanotrophs are obligate _________ because ______________.

Aerobes / The initial step of methan oxidation requires CO2

Whether an organism is classified as a photoheterotroph or a photoautroph depends on its _________.

Carbon Source

By isolating total community RNA, using reverse transcriptase to make cDNA copies of it, and then sequencing the cDNA, ecologist can __________.

Determine the community genome expression at the moment of sampling

What is the difference between facultative anaerobe, an aerotolerant anaerobic , and obligate anaerobic?

Facultative anaerobes can use oxygen to produce more ATP than without it. Aerotolerant anaerobes are unaffected by oxygen. Obligate anaerobes require an oxygen-free environment to survive

Functional traits that can be shared between organism with divergent SSU rRNA sequences because

Functional traits that can be shared between organism with divergent SSU rRNA sequences because

The metabolic diversity of photosynthetic bacteria stems from different ______________.

Lightharvesting complexes Electron donors Organic compounds they produce