During meiosis, homologous chromosomes pair up along their lengths. The most plausible explanation for the karyotype structure shown above is that

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#Question id: 28398

#Unit 5. Developmental Biology

Spemann referred to the dorsal lip cells and their derivatives as the organizer, these derivatives cells are___

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#Question id: 24537

#Unit 11. Evolution and Behavior

An allele at  one locus spreads by natural selection acting on a second locus that is in linkage disequilibrium is an example of____

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#Question id: 10997

#Unit 7. System Physiology – Animal

A 60-year-old woman has a resting heart rate of 70 beats/min, arterial pressure is 130/85 mm Hg, and body temperature is normal. Her pressure-volume diagram of the left ventricle is shown above.

What is her cardiac output in milliliters per minute?

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#Question id: 10990

#Unit 7. System Physiology – Animal

Sympathetic stimulation of the heart normally causes which of the following conditions?

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#Question id: 12188

#Unit 2. Cellular Organization

The series of events by which APC/C promotes the separation of sister chromatids at anaphase.

A. all the kinetochores have attached to spindle microtubules and the spindle apparatus is properly assembled and oriented.

B. Cdc20 specificity factor associated with APC/C directs it to ubiquitinylate securin and mitotic cyclins. 

C. A protease known as separase cleaves the cohesin subunit Scc1 (Rad21), breaking the protein circles linking sister chromatids.

D. anaphase begins as poleward force exerted on the kinetochores moves the split sister chromatids toward opposite spindle poles.

E. Following securin degradation and a decrease in mitotic CDK activity.

Which of the following series is correct?