Based on molecular analyses, scientists now believe the domestication of the closest relatives of modern dogs began

between ____ years ago.



a. 800 and 1,200
b. 1,000 and 3,000
c. 4,000 and 8,000


d. 9,000 and 12,000
e. 18,800 and 32,100


ANSWER: e

Biology & Microbiology

You might also like to view...

What is the function of cyclic dimeric GMP in bacterial global regulation systems?

A. It converts GTP to cGTP. B. It acts as a secondary nucleotide messenger. C. It is a sensor kinase. D. It is an autoinducer.

Biology & Microbiology

Three scientists are using different forms of PCR for their research. Abby wants to determine changes in gene expression levels in a tissue, so she uses ______. Bob is trying to extract genetic information from a wooly mammoth fossil, so he uses ______. Chris needs to express a gene in bacteria that matches the form expressed in kidney cells, so she uses ______.  

A.  Quantitative RT-PCR;  PCR;  RT-PCR B.  PCR;  quantitative RT-PCR;  RT-PCR C.  RT-PCR;  PCR;  quantitative RT-PCR D.  RT-PCR;  quantitative RT-PCR;  PCR E.  Quantitative RT-PCR;  RT-PCR;  PCR Clarify Question · What is the key concept addressed by the question? · What type of thinking is required?   Gather Content · What do you already know about PCR techniques?   Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?   Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?

Biology & Microbiology

Which of the following is a source of carbon skeletons that are used in the synthesis of amino acids?

A. Acetyl-CoA B. Glycolysis intermediates C. TCA cycle intermediates D. All of the choices are correct.

Biology & Microbiology

The nucleus is to eukaryotes as the ________ is to prokaryotes.

A. pili B. glycocalyx C. ribosome D. nucleoid E. cell wall

Biology & Microbiology