The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the corresponding bones in whales have very different shapes and proportions. However, genetic data suggest that all three kinds of organisms diverged from a common ancestor at about the same time. Which of the following is the most likely explanation for these data?

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#Question id: 12711

#SCPH06 I Botany

Various sensors monitor ROS levels in cells; an increase in ROS activates a signal transduction network. ROS scavenging is carried out by antioxidant molecules ____X_________and by antioxidant enzymes such as____Z_________

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#Question id: 423

#SCPH05 I Biotechnology

The glycolytic pathway oxidizes glucose to two molecules of pyruvate and also produces a net of two molecules of ATP. ATP allosterically inhibits the enzyme, PFK-1, that catalyzes the third step of glycolysis. This is an example of ________.

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#Question id: 8694

#SCPH28 | Zoology

Which of the following is (are) problematic when the goal is to construct phylogenies that accurately reflect evolutionary history?

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#Question id: 18635

#SCPH01 Biochemistry

Number of unrooted trees in a phylogeny of five sequences is –

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#Question id: 924

#SCPH01 Biochemistry

Which of the following is not true regarding the oxidation of 1 mol of palmitate (16:0) by the B-oxidation pathway?