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Chapter 23 Human Evolution Flashcards | StudBud
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Chapter 23 Human Evolution
Chapter 23 Human Evolution
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Answers
1
Are you likely to find abundant fossils of soft-bodied animals, like jellyfish?
True
False
2
The wings of birds and insects are ________ structures.
analogous
molecular
vestigial
homologous
3
There are two important aspects to biological evolution: descent from a common ancestor and the fossil record.
True
False
4
What is considered one of the best sources of evidence for biological evolution?
fossil record
the biblical creation stories
evidence for an intelligent designer
the presence of analogous structures
5
The early atmosphere of Earth consisted mainly of
oxygen, water vapor, and carbon monoxide.
water vapor,nitrogen, and carbon dioxide.
hydrogen, carbon monoxide, and nitrogen.
hydrogen, oxygen, and carbon dioxide.
6
What evidence contributed to the formulation of the RNA-first hypothesis?
RNA can sometimes beboth a substrate and an enzyme during RNA processing.
RNA continues to evolve chemically today.
RNA was formed in MIller's experiment.
More primitive cells, such as archaea, use an RNA only informationsystem.
7
The flipper of a whale and the wing of a bird are homologous structures.
False
True
8
All vertebrate forelimbs are the same in that they are used for the same form of locomotion.
False
True
9
What of the following is necessary for the replication process to occur in a cell?
lipids
enzymatic proteins
starches
carbohydrates
10
RNA-first and the protein-first hypotheses must propose a manner for DNA to become the genetic material as it is today.
False
True
11
What type of rock preserves fossils well?
metamorphic rock
igneous rock
gravel
sedimentary rock
12
Biological evolution is the process whereby
humans descended from apes.
species changethrough time.
living cells arose from nonliving chemicals.
prokaryotic cells became eukaryotic cells.
13
What energy source was used by Stanley Miller in his 1953 experiment to replicate the Earth's early environment?
electric spark
gamma radiation
heat
ultraviolet radiation
14
Which of the following is an example of a vestigial structure?
tailbone in humans
All of the answerchoices are examples of vestigial structures.
pelvic girdle in snakes
pelvic girdle and legs in whales
15
Which of the following statements concerning evolution is true?
Unicellular eukaryotes evolved before multicellular eukaryotes.
Nonflowering plants preceded the flowering plants.
Fishes evolved before terrestrial plants.
All of the answerchoices are true regarding evolution.
16
What type of evidence for evolution would arise from a comparison of the DNA sequence of humans and monkeys?
biochemical
anatomical
fossil record
biogeographical
17
Which statement is accurate if the first true cell arose by the RNA-first hypothesis?
RNA genes replicated because of the presence of proteins
The first cell hadRNA genes that could have specified protein synthesis.
All of the answer choices support the RNA-first hypothesis.
None of the answer choices supports the RNA-first hypothesis.
18
What is a characteristic that makes an organism able to survive and reproduce in its environment?
selection
adaptation
culture
analogy
19
Which statement regarding cell reproduction is true?
There is no DNA replication during cell reproduction.
Cell division occurs prior to DNA replication.
DNA replication and cell division occur at the same time.
DNA replicates beforecell division occurs.
20
The early Earth's atmosphere was not the same as it is today
False
True
21
What is the term for someone who searches for and researches fossils?
geologist
physicist
paleontologist
ecologist
22
The hypothesis that life began with the evolution of inorganic compounds is called?
cell theory
speciation
Darwinian evolution
chemical evolution
23
Miller's experiment showed that life could arise via chemical evolution.
False
True
24
What did Darwin conclude from the observation that there are no rabbits in South America?
No asnwer is correct.
Rabbits were originally found in South America but went extinct.
Rabbits cannot live in South America because it is too warm.
Rabbits evolvedsomewhere else and had no means of reaching South America.
25
Closer biochemical structures suggest a closer evolutionary relationship.
True
False
