A researcher is trying to construct a molecular-based phylogeny of the entire animal kingdom. Assuming that none of the following genes is absolutely conserved, which of the following would be the best choice on which to base the phylogeny?

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#Question id: 32311

#Unit 2. Cellular Organization

Internalized receptor-ligand complexes commonly follow the pathway depicted for the:

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#Question id: 10979

#Unit 7. System Physiology – Animal

Which of the following conditions at the A-V node will cause a decrease in heart rate?

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#Question id: 2963

#Unit 2. Cellular Organization

Eukaryotic chromosomes are composed of which of the following macromolecules?

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#Question id: 23152

#Unit 13. Methods in Biology

A fluorescent dye SNARF-1 that is sensitive to H+ concentrations can be used to monitor the cytosolic pH of 

1. Alkaline cells

2. Acidic cells 

3. Dead cells

4. Live cells

Which of the following options are incorrect?

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#Question id: 4836

#Unit 8. Inheritance Biology

If gene frequency between genes a and c is 2%; b and c is 13%; b and d 4%; a and b 15%; c and d 17 and a and d19%. The sequence of genes in a chromosome is