Question

Answer ALL parts please! If so, will give a good rating.

a) This group of bacteria include plant & farmer friendly bacteria that ‘fertilize’ their hosts by providing nitrogen as endosymbionts:

	a.	Nitrospirae
	b.	metamonads
	c.	alpha proteobacteria
	d.	firmicutes
	e.	beta proteobacteria
	f.	euarchaeota

b) The primary way to distinguish between different types of protists is by:

	a.	color or smell
	b.	type of movement
	c.	pathogenicity
	d.	method of reproduction
	e.	primary or secondary endosymbiosis
	f.	shape or size
	g.	pattern of growth

c) There's been a spill of PCE (chlorinated hydrocarbon) next to a dry cleaners. The electrical potential and other indicators show an anaerobic environment. What should you add to the site to help the microbes break it down?

	a.	an electron acceptor in the form of organic carbon compounds
	b.	an electron donor in the form of inorganic compounds like nitrate, iron, or sulfate
	c.	an electron donor in the form of organic carbon compounds
	d.	an electron acceptor in the form of inorganic compounds like nitrate, iron, or sulfate

Answer 1

Answer a)
a. Nitrospirae perform essential functions in the nitrogen cycle by fixing atmospheric nitrogen as plant-absorbable nitrites and nitrates.

Answer b)
b. Type of Movement is a primary characteristic used to differentiate protists into Amoeboid, Ciliate, Flagellate, & Sporozoan

Answer c)
The goal is to replace the extract the chlorines from the PCE, as such we need to neutralise the negative charge on Cl- , this can be done by using electron acceptors. When in the form of organic compounds it is easier for microbes to use them, and also for less toxic products to be formed, hence answer is
a. an electron acceptor in the form of organic carbon compounds