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Mizzou Bio 1500 (Bush) Test 6 With Complete Solutions
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Mizzou Bio 1500 (Bush) Test 6 With Complete SolutionsHow do you know which two of the species on a tree are most closely related?
how long ago they had their common ancestor, NOT by the number of nodes between
them.
Node
a branch point = a point of divergence (a population of a species broke up into 2
populations and each of those subspecies evolved into new species)
Brainpower
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Explain here the reasoning you would need to apply to decide if two trees depict the
same relationship among extant taxa or not.
Is one of the species more closely related to the most recent common ancestor than the
other species?
We can't tell. provided the vertical lines in each of the partitions between the tip and the
ancestor are summed to the same amount, the same length of time has elapsed.
Why is meat red?
myoglobin
function of myoglobin
store O2 in slow/endurance muscles (O2 storage)
What does the O2-MyGb dissociation curve look?
- No cooperative binding so no sigmoidal shape.
- regular saturating curve (hyperbola)
- higher O2 affinity
, What does myoglobin look like in meat?
oxy-myoglobin - bright red
deoxy-myoglobin- dark red
Other myoglobin color changes due to binding
H2O instead of O2 - brown
CO or NO instead of O2 - pink
Explain what "Convergent Evolution" is and provide examples
same characteristics evolve independently due to same selection pressure
mammals and birds both use Hb to transport O2
Bar headed goose and Andean goose both have high alt Hb
What is the statement of the biological species concept?
A group of organisms that can potentially breed with each other and produce live, fertile
offspring
Describe under what conditions it would be either difficult or impossible to test if the
biological species concept applies between two species. How would you finally test
whether two groups represent separate species under this concept? Why would it be
impossible, or at least highly impractical to test whether African Bush and Forrest
Elephants are really proper species under the BSC?
Asexual reproduction, two "species" really far apart, fossils
and the two elephants would never have contact with each other, so it would be hard to
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