There is some indication that the code is in some way ordered; a certain pattern exists. Describe an observation that supports this view
What will be an ideal response?
Certain amino acids may be grouped according to the middle base; for example, U or C in the second position often specifies hydrophobic amino acids. Also, codons with the same two starting letters frequently encode the same amino acid.
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Which of the following mechanisms are causal explanations for bird song?
A. Young males learned their song from their fathers. B. Songs are used by males to attract a mate. C. The ritualization of the vocalization became species specific. D. Air passing through a bird's specialized singing organ, the syrinx, vibrates the surrounding organs.
The hydrogen ions released by the dissociation of carbonic acid are buffered by their
A) binding to hemoglobin. B) transport into the erythrocyte as sodium ions move out. C) binding to DNA within the nucleus. D) transport out of the erythrocyte as a sodium ion moves in. E) active transport out of the erythrocyte.
A single atom of carbon may form up to ____ covalent bonds with other atoms.
A. two B. three C. four D. five E. six
You conduct a dihybrid cross. A ________ ratio would make you suspect that the genes are linked
A) 3:1 B) 1:1:1:1 C) 12:1:1:4 D) 9:3:3:1