Chapter 20: Q.15 (page 504)
Which phylogenetic model proposes that all three domains of life evolved from a pool of primitive prokaryotes?
a. tree of life
b. web of life
c. ring of life
d. network model
Short Answer
Option : (c) ring of life.
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Chapter 20: Q.15 (page 504)
Which phylogenetic model proposes that all three domains of life evolved from a pool of primitive prokaryotes?
a. tree of life
b. web of life
c. ring of life
d. network model
Option : (c) ring of life.
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Figure 20.10 Which animals in this figure belong to a clade that includes animals with hair? Which evolved first, hair or the amniotic egg?

Compare three different ways that eukaryotic cells may have evolved.
Dolphins and fish have similar body shapes. Is this feature more likely a homologous or analogous trait?
What do scientists in the field of systematics accomplish?
a. discover new fossil sites
b. organize and classify organisms
c. name new species
d. communicate among field biologists
On a phylogenetic tree, which term refers to lineages that diverged from the same place?
a. sister taxa
b. basal taxa
c. rooted taxa d
. dichotomous taxa
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