Biology 211 Exam 1 (Colbert) – Questions With Proven
Solutions
What part of the squid is homologous to the snail foot? Correct Answer -
Tentacles
What does phylogenetic evidence tell us about protostomes? Correct
Answer - There were multiple transitions from water to land.
The signature animal morphological feature called the corona (a cluster of
cilia) is found in ___________. Correct Answer - Rotifers
The expression of the gene dpp in the bilateral form in a variety of animals if
evidence that ___________. Correct Answer - Bilateral symmetry in all
animals is homologous.
Why was the evolution of a coelom a critically important innovation for
animals? Correct Answer - The coelom can act as a hydrostatic skeleton.
What reproductive trait is associated with terrestrial environments? Correct
Answer - Internal fertilization.
Why are protists considered paraphyletic? Correct Answer - They
include some but not all descendants of their most recent common ancestor.
According to the endosymbiosis theory, what type of organism is the original
ancestor of the chloroplast? Correct Answer - A cyanobacterium.
Which of the following is a synapomorphy that defines all green algae and
land plants? Correct Answer - Chloroplasts containing chlorophylls a
and b.
archaea Correct Answer - They have unique ether-linked lipids in their
plasma membranes.
Why can dinoflagellate blooms be harmful to humans? Correct Answer -
People can get paralytic shellfish poisoning during dinoflagellate blooms.
, Which evidence is consistent with the endosymbiotic hypothesis for the origin
of the mitochondrion? Correct Answer - Mitochondria have their own
ribosomes and manufacture their own proteins.
Molecular phylogenies were first used to separate bacterial and archaeal
lineages based upon the sequence data from which of the following
molecules? Correct Answer - Ribosomal small subunit RNA
Why do species that release H2S as a by-product often live side by side with
species that use H2S as an electron donor? Correct Answer - One species
provides the necessary chemical for the other to survive.
What distinguishes bacteria from archaea? Correct Answer - Only
bacteria have peptidoglycan in their cell walls.
The idea that older Rocks are further from the surface than newer rocks
Correct Answer - Stratigraphy
This dating process is used in mainly igneous and metamorphic rocks
Correct Answer - Radiometric Dating
The margin of error for radiometric dating is... Correct Answer - 10%
If a rocks half-life is 1.3 byo and has 50% K-40 and 50% a-40 how old is that
rock Correct Answer - 1.3 billion years old
Carbon dating (which uses radiometric dating) can only be used on rocks that
are how old Correct Answer - 50,000 years old
Something that can be observed to occur Correct Answer - Fact
Prediction of what will happen Correct Answer - Hypothesis
Universal relationship of how the natural world behaves under specific
conditions (Newton's Gravity) Correct Answer - Law
A well accepted idea using scientific knowledge and known facts Correct
Answer - Scientific theory
Solutions
What part of the squid is homologous to the snail foot? Correct Answer -
Tentacles
What does phylogenetic evidence tell us about protostomes? Correct
Answer - There were multiple transitions from water to land.
The signature animal morphological feature called the corona (a cluster of
cilia) is found in ___________. Correct Answer - Rotifers
The expression of the gene dpp in the bilateral form in a variety of animals if
evidence that ___________. Correct Answer - Bilateral symmetry in all
animals is homologous.
Why was the evolution of a coelom a critically important innovation for
animals? Correct Answer - The coelom can act as a hydrostatic skeleton.
What reproductive trait is associated with terrestrial environments? Correct
Answer - Internal fertilization.
Why are protists considered paraphyletic? Correct Answer - They
include some but not all descendants of their most recent common ancestor.
According to the endosymbiosis theory, what type of organism is the original
ancestor of the chloroplast? Correct Answer - A cyanobacterium.
Which of the following is a synapomorphy that defines all green algae and
land plants? Correct Answer - Chloroplasts containing chlorophylls a
and b.
archaea Correct Answer - They have unique ether-linked lipids in their
plasma membranes.
Why can dinoflagellate blooms be harmful to humans? Correct Answer -
People can get paralytic shellfish poisoning during dinoflagellate blooms.
, Which evidence is consistent with the endosymbiotic hypothesis for the origin
of the mitochondrion? Correct Answer - Mitochondria have their own
ribosomes and manufacture their own proteins.
Molecular phylogenies were first used to separate bacterial and archaeal
lineages based upon the sequence data from which of the following
molecules? Correct Answer - Ribosomal small subunit RNA
Why do species that release H2S as a by-product often live side by side with
species that use H2S as an electron donor? Correct Answer - One species
provides the necessary chemical for the other to survive.
What distinguishes bacteria from archaea? Correct Answer - Only
bacteria have peptidoglycan in their cell walls.
The idea that older Rocks are further from the surface than newer rocks
Correct Answer - Stratigraphy
This dating process is used in mainly igneous and metamorphic rocks
Correct Answer - Radiometric Dating
The margin of error for radiometric dating is... Correct Answer - 10%
If a rocks half-life is 1.3 byo and has 50% K-40 and 50% a-40 how old is that
rock Correct Answer - 1.3 billion years old
Carbon dating (which uses radiometric dating) can only be used on rocks that
are how old Correct Answer - 50,000 years old
Something that can be observed to occur Correct Answer - Fact
Prediction of what will happen Correct Answer - Hypothesis
Universal relationship of how the natural world behaves under specific
conditions (Newton's Gravity) Correct Answer - Law
A well accepted idea using scientific knowledge and known facts Correct
Answer - Scientific theory
