Name (signat-.-, _
1. Are rhesus macaques more closely related to lion-tailed Gibbon
macaques or to stump-tailed macaques?
Shem? -' Jraxg‘w‘a .-.~xaca%tes Slamang
2. Circle the most recent common ancestor of siamangs ‘ Gorilla
and humans. ' .
Bio 3400 F513 Test 2
L C : x small rodents that are famous for their ‘boorn-to-bust’ cycles: populations periodically
I so: large-that the number of individuals cannot be sustained and the population crashes to near
ventrally, toward the belly of the zebra, generating stripes.
3. In a population of the cone-headed katydid, some individuals have
longer cones on their heads than do others. Dr. J thinks that cone-length
is a highly heritable trait, whereas Dr. S thinks
Bio 3400: Evolution and Ecology
Instructor: Dr. Sarah L. Bush Tel. 573-882-1549
email: [email protected] Ofﬁce: 115 Tucker
informed citizens, able to participate in discussions on scientiﬁc topics of social and
political relevance, and to be r
1 tetrapods evolved from fish
ancestors of reptiles branched off next
both birds and mammals evolved from reptiles
8. Mammals diversified
Primates evolved from insectivores
o Forward facing eyes
o Opposable thumb
9. Human Evolution
1. Which type of survivorship curve does this population exhibit?
Its a convex (or Type I) survivorship curve, which is usual for species that have a
small number of offspring and are well cared for.
2. a. What is the life expectancy of infants (in years)
Before proceeding, make sure you understand the following terms:
homozygous dominant, homozygous recessive
1. You have sampled a pop and find that at a particular locus (called T), 36% o
Biology 3400 10:00am
October 16, 2015
Hmwk 5: Discussing Evolution
1. Scientists suggest that humans evolved through natural selection. Natural selection is not
by random/by chance. Evolution has random processes, but not natural selection.
Propposed natural selection as mechanism of evolution
Was influenced by ideas of contemporaries
o 1. Lyell- geologist
Look for natural causes
Small gradual changes accumulate into large changes
o 2. Malthus
Limitations on population si
Aaron White 16132782
1. It's ludicrous to suggest that humans could have evolved just
While genetic variance is random, evolution does not occur
through chance. The organisms with beneficial mutations have
Modes of selection
Selection can cause a trait to change or stay the same
o 1. Directional Selection: Favors an extreme value of a trait
Increases (or decreases) the avg. value of the trait
o 2. Stabilizing Selection: favors intermediate value of a trai
-_ 1% T‘; J“. i. 2.)“ ’5 " ’ 6
Bio 3400 F813 Test 4
_ . -x - .wi skull is discovere” in a rock quarry and is given to biologists to identify. Dr. R says that the
skull— belonged to a reptile, whereas Dr. M argues that the skull is from an early mammal.
‘iologi'St is udying the pOpulation dynamics of amphiumas and calculates the '
_ 1'49' . '
a cohort of 500 am hiumas. Use the life table to answer the que
Age class x “I-
1-5 weeks 075 1.51 1-50
‘6-10 weeks 039 0-76
IIeISweeks ma 0
Attached you will ﬁnd the records for Saint John's Cemetery in Pettis County, Missouri. Your
task is to construct a life table based on the data from the records, and use It to plot a
survivorship curve and to evaluate life expect
Study Questions for the ﬁnal exam.
1. What is evolution?
2. What are the mechanisms of evolution?
3. What is heritability and how is it measured?
4. How do the different forms of selection differ from each other? How are they the
. What is genetic d
Gene: a segment of DNA with instructions for building a protein molecule
o Specifies sequence of amino acids
Alleles: different possible forms of the same gene
o Differ in DNA sequence, and therefore in protein structure they code
What was the clue linking the wolf-like land mammal to early whales?
3. Vestigial structures:
Structures that have no apparent purpose, but that are carry-overs from
The skeletons of different animals are similar
Levels of Selection
Individual (or gene-level) selection
o Alleles that facilitate survival/ reproduction of the individual increase
o Alleles can be passed on through personal reproduction or
reproduction of close kin
o Alleles th