The pharynx opens into both the trachea and _________

Fill in the blank(s) with the appropriate word.


Answer: esophagus

Biology & Microbiology

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Calvin Bridges, an associate of Thomas Hunt Morgan's, found further evidence that genes were located on chromosomes. Which of the following is not a component of his study?

A. He crossed white-eyed females (XwXw) with red-eyed males (XWY). B. The F1 progeny were mostly the red-eyed males and white-eyed females expected. C. A few rare white-eyed females and red-eyed males were observed, which he called primary exceptionals. D. He proposed that the rare white-eyed females were the result of abnormal chromosome number. E. Abnormal chromosome number was a result of nondisjunction in the female fly.

Biology & Microbiology

What is the leading scientific hypothesis explaining how the endomembrane system of eukaryotic cells originated?

A. From the inward folding of the plasma membrane B. From engulfing eukaryotic cells C. From engulfing prokaryotic cells D. From the spontaneous formation of phospholipids

Biology & Microbiology

A mutation that changes a normal codon to a stop codon is called a ________ mutation.

A. missense B. silent C. point D. nonsense E. back

Biology & Microbiology

During translation elongation, which event happens last?

A. A tRNA molecule translocates from the P site to the E site. B. A tRNA carrying an amino acid binds to the A site. C. A tRNA molecule translocates from the A site to the P site. D. A peptide bond forms.

Biology & Microbiology