chapter 24.3- 24.4

Question 1

primary producers are

Answer 1

organisms that reduce carbon dioxide to carbohydrates

Question 2

what is assimilation?

Answer 2

a process in which a plant or primary producer take sulfate from the soil and turns it into nutrients

Question 3

why can’t primary producers capture sulfate directly?

Answer 3

sulfate doesn’t really exist in environments where oxygen is present and toxic to eukaryotes

Question 4

what is nitrogen? fixation?

Answer 4

is the process of converting nitrogen to ammonia

Question 5

nitrogen cycle facts

Answer 5

• only bacteria and archea can reduce nitrogen gas to ammonia
• primary producers assimilate ammonia nitrate

Question 6

dentrification

Answer 6

when bacteria converts nitrate into nitrogen gas using nitrate as an electron acceptor

Question 7

Annamox

Answer 7

allows for prokaryotes to act as chemotautotrophs by oxidizing ammonia to nitrogen gas

Question 8

periodic selection

Answer 8

increases then decreases whebnn there is a successful variant

Question 9

protobacteria

Answer 9

contain the organisms that are anoxygenic photosynthetic bacteria