Nitrosomonas europaea uses the enzyme ammonia monooxygenase (AMO) and hydroxylamine oxidoreductase in nitrification reactions. Place the reaction steps in the proper order from first occurring to end result.1. NH3 + O2 + 2H+ + 2e-2. NH3OH + H2O3. NO2 + 5H+ + 4e-

Fill in the blank(s) with the appropriate word(s).


2, 3, 1

Biology & Microbiology

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This table shows the abundance of iridium in and near the K–T boundary layer. Depths are given as meters above or below the boundary layer. The iridium content of an average Earth rock is 0.4 parts per billion (ppb) of iridium. An average meteorite contains about 550 parts per billion of iridium. Which conclusion do these data best support?

1.the earth was struck by a large asteroid 65.5 million years ago 2.an asteriod collision caused a mass extinction that wiped out the dinosaurs 3.the K-T boundary indicates the beginning of an ice age 4.rates of evolution increased dramatically after the K-T boundary

Biology & Microbiology

Fossil evidence shows that all modern human populations evolved from human ancestors in Africa

Indicate whether the statement is true or false

Biology & Microbiology

Communication between neurons is achieved by 

A. hormones. B. electricity. C. neurotransmitters. D. depolarizing the synapse.

Biology & Microbiology

The structure that directs food into the body of a rotifer is called the corona.

Answer the following statement true (T) or false (F)

Biology & Microbiology