radiation

Question 1

Phototrophs use visible light rays as an energy source.
Non-photosynthetic microbes tend to be damaged by the toxic oxygen products produced by contact with light.
Some microbial species produce yellow carotenoid pigments to absorb and dismantle toxic oxygen.
Ultraviolet and ionizing radiation can be used in microbial control.

Answer 1

radiation

Question 2

Exist under pressures that range from a few times to over 1,000 times the pressure of the atmosphere
These bacteria are so strictly adapted to high pressures that they will rupture when exposed to normal atmospheric pressure.

Answer 2

Barophiles

Question 3

Organisms live in close nutritional relationships :requires by one or both members

Answer 3

symbiotic

Question 4

list the 3 symbiotic relationships andexplain them

Answer 4

mutualism-both members benefit
commensalism-one partner benefits:other member not harmed
parisitism: parasite is dependent and benefits, host harmed

Question 5

Nonsymbiotic

Answer 5

synergism-members cooperate and share nutrients
anatagonism- some member are inhibited or destroyed by others

Question 6

organisms are free living, relationships not required for survival

Answer 6

nonsymbiotic