After married couples, which family type is the second largest parenting group with children under 18?

The microbiome are found in/on the:

These phototrophic bacteria live in anaerobic mud at the bottoms of lakes and ponds that are rich in hydrogen sulfide. They have bacteriochlorophylls and are anaerobic (do not use oxygen gas) and anoxygenic (do not produce oxygen gas).

Match the protozoan to the disease or symptoms it causes.

These Archaeans need a very high salt environment to survive and can spoil salted foods like fish & sausages

All are true about vectors except:

These prokarytoic phototrophic microbes have helped shape the earth’s atmosphere. They contain chlorophyll a for photosynthesis, gas inclusions, produce oxygen gas, and have heterocysts for nitrogen fixation.

Different strains of bacteria can be classified based on used of animal blood serum with antibodies (antisera) that recognize and react with bacterial cell surface molecules.  One example is blood typing. This is known as:  

These microbes are Archaeans that cannot grow below 80 degrees C and prefer neutral pH ranges.

A small circular piece of RNA with no capsid that can be infectious and pathogenic in plants. In potatoes it can stunt growth.