All chordates have (a) _____
a. backbone c. notochord
b. jaws d. both jaws and notochord
C
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The accumulation of different mutations in genetically separated populations is known as ____ and is the key to speciation
Fill in the blank with the appropriate word.
Which of the following statements about adhesion molecules is false?
A. Cadherins and pectins are both transmembrane proteins. B. Cadherins and integrins provide the molecular mechanisms for adhesion in animals, but not plants. C. Cadherins adhere adjacent epithelial cells to one another. D. Integrins bind epithelial cells to the extracellular matrix. E. Pectins are found in plant tissues, but not animal tissues.
Which molecules are involved in proteins synthesis?
a. rRNA, tRNA, mutagens b. transfer RNA, introns, and mutagens c. mRNA, introns, and ribosomal RNA d. mRNA, rRNA, and tRNA
Which of the following processes directly produce the most ATP?
a. synthesis of acetyl-CoA b. the Krebs cycle c. Glycolysis d. the electron transport chain