How many bases are required to form a codon?
a. 5
b. 2
c. 4
d. 1
e. 3
e
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Answer the following statements true (T) or false (F)
1. Hagfish are craniates but are not vertebrates. 2. A hagfish is a not a fish. 3. Lampreys' main body support is the notochord, not a vertebral column. 4. Sharks have cartilaginous skeletons because bone-forming ability had not yet evolved in vertebrates when they originated. 5. The swim bladder is an organ in primitive fish from which the lungs of terrestrial vertebrates developed.
Two amino acids are bonded together to form a
dipeptide by what type of reaction?
a. condensation b. oxidation reduction c. hydrolysis d. decomposition e. acid-base
The cohesiveness between water molecules is due largely to:
a. hydrogen bonds. b. polar covalent bonds. c. nonpolar covalent bonds. d. ionic bonds. e. hydrophobic interactions.
The ________ are an important and often overlooked group of organisms that release nutrients into the soil or water
A) decomposers B) heterotrophs C) producers D) autotrophs E) tertiary consumers