The portion of an amino acid that makes the amino acid unique among the 20 different amino acids is
A. peptide bonding.
B. the side chain or R-group.
C. hydrocarbon.
D. amino.
E. carboxyl.
Answer: B
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All of the following are examples of how animals gain water EXCEPT
a. metabolism. b. foods. c. drink. d. evaporation.
Archaea have multiple types of RNA polymerase
Indicate whether the statement is true or false.
GENETIC DRIFT IS THE RESULT OF _____
Fill in the blank(s) with the appropriate word(s).
Which of these is the correct explanation of mass change in developing eggs as illustrated in the graph?
A) A is the correct representation of mass change because as the baby bird develops inside the egg, it grows new parts. B) B is the correct representation of mass change because the baby bird uses cellular respiration to fuel the biosynthesis of new parts and gives off mass as CO2. C) C is the correct representation showing that nothing new comes into the egg and nothing leaves the egg, so it retains the same mass.