Currently, two of the living elephant species (X and Y) are placed in the genus Loxodonta, and a third surviving species (Z) is placed in the genus Elephas. Assuming this classification reflects evolutionary relatedness, which of the following is the most accurate phylogenetic tree?

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#Question id: 2563

#Unit 2. Cellular Organization

The eyes and the respiratory tract are both protected against infections by ________.

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#Question id: 2564

#Unit 2. Cellular Organization

A cell with a predominance of rough endoplasmic reticulum is most likely ________.

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#Question id: 2565

#Unit 2. Cellular Organization

Which of the following is the most plausible explanation for why an animal cell would be unable to reduce the Ca2+ concentration in its cytosol compared with the extracellular fluid?

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#Question id: 2566

#Unit 2. Cellular Organization

An inhibitor of which of the following enzymes could be used to block the release of calcium from the endoplasmic reticulum?

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#Question id: 2567

#Unit 2. Cellular Organization

What is a primary function of transcription factors?

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#Question id: 2568

#Unit 2. Cellular Organization

A mutation that disrupts the ability of an animal cell to add polysaccharide modifications to proteins would most likely cause defects in which of the following organelles or structures?