BIO 114 (EXAM 4) (Answered) 137 Questions and
Correct Answers With Verified Solution | Graded A+ |
100% Correct| Latest Updated Fall 2024/2025.
Natural selection
favors individuals that reproduce more than others.
Adaptation
describes a trait that increases an individuals ability to survive in a particular environment
Heritability
the ability of a trait to be passed onto an offspring
What organism could be produced by artificial selection?
a cow that produces a large quantity of milk
A larger Hen, Large Rooster
can be bred to produce larger chickens
Cetaceans evolved before even-toed ungulates, such as deer and cows. T/F
FALSE
There are only two extinct groups of cetaceans: Rodhocetus and Dorudon. T/F
FALSE
Living cetaceans share a more recent common ancestor with hippopotamuses than with extinct
cetaceans. T/F
FALSE
Rodhocetus went extinct approximately 40 million years ago. T/F
TRUE
All the branches that extend to zero on the timeline represents animal groups living today.
TRUE
Proteomics
reveal a set of proteins within a cell or tissue type, that genomics cannot
gene density - humans have ~20,000 protein-encoding genes in a 3,000 Mb. T/F
TRUE
, Reinforcement is a type of natural selection
TRUE
Genetic drift
a change in allele frequencies caused by random events.
What three animals have identical amino acid sequences for the FOXP2 protein?
Chimpanzee, gorilla, rhesus monkey
At which point in the adaptation of a population is it clear that speciation has occurred?
Gene pool changes establish reproductive barriers between two populations
Which of the following evolutionary mechanisms does not contribute to the process of allopatric
speciation?
gene flow
What is the first thing that must happen in order for speciation to occur?
gene flow between populations must be interrupted
The morphological species concept distinguishes species by
body shape and other structural species
A new species of plant arises as an allopolyploid from two other plants, one with a diploid number of
14 and one with a diploid number of 18. What would the diploid number of the new species most
likely be?
32
Which of the following organisms is most likely to be subject to allopatric speciation?
Pine trees in Alaska and pine trees on the island of Madagascar
Prezygotic barriers
prevent fertilization of gametes from members of closely related species
In which of the following groups has sympatric speciation been most important?
plants
Which of the following is an example of a postzygotic reproductive barrier?
Two fruit flies of different species produce sterile offspring
In the case of the Lake Victoria cichlids, sympatric speciation has been shown to be driven by
sexual selection
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