17.3 Darwin, Wallace, and Natural Selection.
OLD BONES AND ARMADILLOS.
Darwin collected thousands of species during his voyage on the Beagle and brought them
back to England. Descent with modification- armadillo and glyptodonts are extremely
similar. So t
Taggart Ch. 17.
17.1 Early Beliefs, Confounding Discoveries.
QUESTIONS FROM BIOGEOGRAPHY.
Aristotles beliefs laid the groundwork for the view of life of fourteenth century scholars.
According to this view, all species were created at the same instant and
Types of hosts:
1) Primary (or Definite)- Parasite reaches maturity and reproduces sexually (if
applicable) within the host.
2) Intermediate- Carries larval stage of parasite. Some development is made.
3) Reservoir- Harbor a parasite that infests humans s
BISC 101Lxg Fall 2015
Lab 1: Using a Microscope to View Your Own Cheek Cells
Week of 07-11 September 2015
GOALS OF THIS LAB:
Microscopes are very powerful tools commonly used in Cellular & Molecular Biology that allow
researchers to visualize objects that
BISC 101Lxg Fall 2015
Group Presentation Guidelines
BISC 101Lxg 2015 Group Presentation Guidelines (15 pts)
During the week of November 16th-20th, each group is required to give an oral presentation of a
scientific paper addressing specific topics in mole
BISC 101Lxg Week of 09-13 Feb
Lab 2: Spectrophotometric Analysis of Nucleic Acids
Spectrophotometric Analysis of
In Lecture 6, you were introduced to the nucleic acids. Reliable quantitation of
microgram amounts of nucleic acid
BISC 101L Lab 4:
Polymerase Chain Reaction
Week of October 20, 2015
Start Preparing for Group Presentations!
Important Dates for Group Presentation:
Weeks of November 2nd and 9th
Submit your choice of the scientific paper for
Week of 07-11 Sept 2015
FOR ANYONE WHO DID NOT COME LAST WEEK
Please reach me after the lab to sign
the Safety Regulations .
Review the various parts of
the compound light
Ames test- a quick test to determine carcinogenity of a food substance. Proved alfalfa
sprouts were carcinogenic.
Examples of oxidants and free radicals: hydroxyl, superoxide, and peroxide
Oxidants are reactive oxygen species that form as a b
HABITAT FRAGMENTATION & SPECIES EXTINCTION
habitat loss- complete degradation of a habitat
introduction of exotic species, invasive species- the new species have no natural
predators in the area the are introduced to so they experience a population expl
Climate is very dry and very cold 2 inch of precipitation in the form of snow. Coast:
Warmest month of the year 32 degrees F and coldest -22 degrees F, inland : warmest
-4 degrees F, coldest -94 degrees F. has the coldest temperature -129 degr
Evaluation of RiskPhyscological?
Economic aspects: existence value, bequest value, use of previous payments?
Framework for risk evaluation: Benefit-cost analysis, decision analysis, political process.
Risk management- insurance, regulations & standards (
Distinct natural units?
Superorganisms- species where individuals within the population have a specific
job. Example would be ants.
Continuum concept- babies require experience (such as breast feeding) that humans
have adopted ove
17.5 Dating Pieces of the Puzzle.
At one point only relative ages could be issued to fossils such as:This fossil is younger
than the one underneath it but older than the one above it. Radiometric dating, a means
of measuring proportion
Coevolution between species. Reciprocal selection pressures on two interacting
species. Such as a parasite and host. In many cases they coevolve together. Coevolution
between the yucca plant (10 15 ft; flowering) and one species of moth that poll
17.7 Divergences From a Shared Ancestor.
Comparative morphology- studying and comparing body forms or major groups of
Similar body parts are known as homologous structures.
Populations of a species diverge after gene f
ENVIRONMENTAL IMPACT ASSESSMENTS (EIAs)
National Environmental Protection Act (NEPA)
Other names for an EIA include an environmental assessment (EA) and environmetal
A D before any of the names means the document is still only a draft.
EXXON-VALDEZ OIL SPILL
March 24, 1989
Prince William Sound, Alaska
Confounding factors: climate change (Milankovitch 40,000 year cycle), food webs,
biotervation (burrowing organisms make oil seep deeper), beach washings (boiling water
killed many organ
17.4 FossilsEvidence of Ancient Life.
Leonardo da Vinci connected mountain top fossils and layered rock of fossils, then no
fossils to being evidence of ancient, layered sea communities. By the 1700s people
began to accept fossils as evidence of the past.
DNA is organized into structures known as chromosomes. DNA contains the
instructions needed to constuct other components of cells, such as proteins and RNA
molecules. DNA is a double helix of base or nucleotide pairs (A-T and C-G) tha
Objectives: (1 pt)
What was the goal of this weeks lab?
Determine genotype for Alu insertion and perform Hardy-Weinberg analysis of class
PCR amplify the Alu sequence from isolated DNA
Observations and Modifications: (1 pt)