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Chapter 10 Quiz 1
Final Practice
20
Biology
05/08/2011

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Term
Plant species A has a diploid chromosome number of 18. Plant species B has a diploid chromosome number of 10. A new species C arises as an allopolyploid of species A and B. What is the most likely diploid chromosome number of species C?
Definition
28
Term
Which of the following groups would be placed nearest the fungi in a phylogenetic tree based on DNA sequences?
Definition
animals
Term
Populations of Larus gulls around the North Pole show an unusual pattern of reproductive isolation. Each population is able to interbreed with its neighboring populations, but populations separated by larger geographic distances are not able to interbreed. This type of species complex is known as a:
Definition
ring species.
Term
Horses and donkeys can breed and produce sterile offspring known as mules. Horses and donkeys remain separate species because of this hybrid sterility, which is:
Definition
a postzygotic barrier to reproduction.
Term
If formerly interbreeding organisms are prevented from the production of fertile offspring, ____________ has occurred.
Definition
reproductive isolation
Term
Which of the following is NOT a prezygotic barrier to interbreeding between different species?
Definition
Hybrids between the two species are infertile.
Term
The morphological species concept:
Definition
groups species based on similar phenotype.
Term
All mammals have hair because they inherited that trait from a common ancestor. Features that are inherited from a common ancestor are called:
Definition
homologous features.
Term
To which one of the following is the bat's wing NOT homologous?
Definition
the dragonfly's wing
Term
The biological species concept is primarily based on:
Definition
reproductive isolation.
Term
The taxonomic rank that includes species but not families is:
Definition
genus.
Term
According to the biological species concept, species are natural populations of organisms that have the potential to interbreed and that are ____________ isolated from other such populations.
Definition
reproductively
Term
All living organisms have evolved from a single common ancestor. The existence of which molecule lends the greatest support to this statement?
Definition
ribosomal RNA
Term
The oldest prokaryotic fossils have been dated:
Definition
3.5 billion years ago.
Term
The current mass extinction is believed to be primarily caused by:
Definition
human actions.
Term
At the time life first evolved on earth:
Definition
there was less oxygen and more methane in the atmosphere than there is today.
Term
The __________________________ propelled the flowering plants to an explosive adaptive radiation.
Definition
evolutionary innovation of the flower
Term
ā€œEstablishing a phylogeny for bacteria is more difficult than establishing a phylogeny for plants or animals.ā€ This statement is:
Definition
correct because bacteria can engage in lateral gene transfer.
Term
The taxonomic rank that includes genera but not orders is:
Definition
family.
Term
Researchers have found that mixtures of phospholipids placed in water or salt solutions tend to spontaneously form:
Definition
small spherical units that resemble living cells.