Exam 24: Microbes and the Environment

The thermocline is broken down by temperature changes that allow upwelling to occur.

Which of the following genera is a nitrifying microbe?

Where is the majority of Earth's water found?

Which plant(s)would likely have a mutualistic relationship with Rhizobium bacteria?

You have drained a pond that you have on your property,to then make it a deeper pond.In the process of using a machine to dig out some of the mud,you find that the mud is almost solid black and there is a terrible smell.Your prediction is that ________________ bacteria predominate in this area of the mud.

Contributions of the bacterium Thiobacillus include:

The overall role that a species serves in a community is its

You are "living off the grid",meaning that you are not using any public utilities---no water supply,no sewer connection,no natural gas or electricity.You do have a septic tank,whose pipe carries sewage out into the back yard.There is also a small pond out there that you have stocked with fish.However,you notice that the fish are floating dead in the water,and the pond seems to have a green scum on it.What has happened?

Which of the following converts carbon dioxide to methane?

Most of the organic sulfur is located in:

The slowly decaying organic litter from plant and animal tissues that is found in the soil is called

Metagenomic analysis involves DNA sequencing of various samples taken from a particular habitat.

Which of the following is not true of biogeochemical cycles?

The major group of organisms that fix nitrogen into ammonia and then oxidize it to nitrate are:

The energy of the sun is converted into chemical energy during