Which of the following is a type of signaling in which a cells respond to substrate that they themselves release ?

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#Question id: 12934

#XL - S Microbiology

Reverse transcriptase enzyme is isolated from____

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#Question id: 1086

#XL - Q Biochemistry

What is the most likely mechanism by which testosterone functions inside a cell?

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#Question id: 6944

#XL - T Zoology

Which would lead to a dorsalized embryo? (Recall that genes in Drosophila are named for their mutant phenotype.

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#Question id: 11281

#XL - R Botany

Owls eat rats, mice, shrews, and small birds. Assume that, over a period of time, an owl consumes 5,000 J of animal material. The owl loses 2,300 J in feces and owl pellets and uses 2,500 J for cellular respiration. What is the production efficiency of this owl?

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#Question id: 11713

#XL - S Microbiology

Theoretically, which two of the following present the richest potential sources of silica?

1.  marine sediments consisting of foram tests

2.  marine sediments consisting of diatom cases (valves)

3.  marine sediments consisting of radiolarian shells

4.  marine sediments consisting of dinoflagellate plates