The use of radioactive elements to date geological specimens is called ________
Fill in the blank(s) with correct word
radiometric dating
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A peptide has the sequence NH2-phe-pro-lys-gly-phe-pro-COOH. Which of the following sequences in the coding strand of the DNA could code for this peptide?
A) UUU-CCC-AAA-GGG-UUU-CCC B) AUG-AAA-GGG-TTT-CCC-AAA-GGG C) TTT-CCC-AAA-GGG-TTT-CCC D) GGG-AAA-TTT-AAA-CCC-ACT-GGG E) ACT-TAC-CAT-AAA-CAT-TAC-UGA
Many of the signaling pathways used for communication between cells in complex multicellular organisms first evolved in:
A. unicellular eukaryotes. B. simple multicellular eukaryotes. C. unicellular prokaryotes. D. simple multicellular prokaryotes. E. complex multicellular prokaryotes.
What is the type of speciation that can occur in an
instant with a change in chromosome number? a. temporal b. mechanical c. behavioral d. ecological e. polyploidal
In the lab, you choose to design a simple experiment to distinguish between hydrophilic and hydrophobic substances. You start by adding equal amounts of vinegar and oil to a container
After shaking, the vinegar and oil levels separate, based upon polarity and density. To this you add glucose and sodium citrate and shake again. Where do you expect to find the glucose and sodium citrate in greatest quantities? A) Both will concentrate in the oil layer. B) The glucose will concentrate in the vinegar, sodium citrate in the oil. C) Both will concentrate in the vinegar layer. D) Sodium citrate will concentrate in the vinegar, glucose in the oil. E) Both will be uniform throughout both layers.