Nitrifiers are chemolithoautotrophs that use either ________ or ________ as electron donors in a process called nitrification.
Fill in the blank(s) with the appropriate word(s).
nitrite, ammonium
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__________ are asymmetrical and do not have tissues or organs. Fill in the blank(s) with the appropriate word(s)
When a bacterium is introduced to a new environment that is an appropriate medium for that species to grow, fission allows a rapid expansion of the population (2-4-8-16-32-64... etc). But there is usually a slight lag before the bacteria actually begin building up such a logarithmic growth curve. What is the best explanation?
A. It takes time for sub-cellular units to evolve the ability to digest new media B. A bacterium is not actively producing all the enzymes it can code for, and it takes time to induce and amplify the production of the currently needed enzymes C. Binary fission becomes more and more efficient D. A new media dissolves away repressor proteins E. Structural genes act more slowly than metabolic genes
Why are agricultural GMOs developed?
What will be an ideal response?
Suppose you've assumed the following two data-generating processes: (1) Yi = f (Hi, Ji) and (2) Ji = g (Xi, Zi). What do these assumptions imply?
A. X has an indirect causal effect on J. B. J has a direct causal effect on H. C. Z has an indirect causal effect on Y. D. Z has a direct causal effect on Y.