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Question
Which period is the most recent?a. Triassic
b. Silurian
c. Devonian
d. Permian
e. Cambrian
Answer
This answer is hidden. It contains 1 characters.
Related questions
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A __________ is a term given to a macromolecule (large molecule) made up of individual subunits.
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The following are basic building blocks of biopolymers. Match the building blocks with the statements below.a. amino acidb. glucosec. glycerold. fatty acide. nucleotideThe basic unit of RNA
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In the figure above, the honeycomb on which the bee is standing is made up primarily of which of the following:
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b. straight or branched chain
c. glucose subunits
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Glucose and fructose
a. form rings with the same number of carbon atoms.
b. both have two oxygen atoms as part of their ring structure.
c. are alike in that both have identical functional groups.
d. contain the same number of hydrogen atoms and hydroxyl groups.
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Oligosaccharides include
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d. lactose
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Fructose and glucose are
a. isotopes.
b. monosaccharides.
c. disaccharides.
d. six-carbon sugars.
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Monosaccharides may be characterized by all EXCEPT which of the following?
a. a ketone group
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d. one carbonyl group
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Although carbon dioxide contains carbon, it is not considered an "organic" compound because
a. it is not found in the earth's crust.
b. it is not present in living cells.
c. the carbon atom is not bonded to at least one hydrogen atom.
d. the carbons are not in chains or rings.
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c. photosynthesis.
d. cell membranes.
e. all of these.
Q:
Isotopes of atoms
a. are electrically unbalanced.
b. behave the same chemically and physically but differ biologically from other isotopes.
c. are the same physically and biologically but differ from other isotopes chemically.
d. have the same number of protons but a different number of neutrons.
e. are produced when atoms lose electrons.
Q:
Which is the smallest unit of an element that retains the properties of the element?
a. atom
b. compound
c. ion
d. molecule
e. mixture
Q:
The ability of a solution to resist changes in pH depends on its ______________.