Download Evidence for Evolution Webquest

Evidence for Evolution Webquest
Fossil Record: http://www.enchantedlearning.com/subjects/dinosaurs/dinofossils/index.html
1. Identify the importance of fossils as evidence of evolution.
2. In what type of rock do we find fossils in? Why is that possible?
3. Compare the differences of the following fossils:
Imprint (Impression) fossils:
Mineralization fossils:
Molds / Casts:
Frozen fossils:
Fossils in amber:
Fossils in tar pits:
4. What is:
an index fossil______________________________________________________________________________________
stratigraphy__________________________________________________________________________________________
radioisotope dating___________________________________________________________________________________
Comparative Anatomy (Homologous & Vestigial Structures, Embryological Development)
Homology & Analogy: http://evolution.berkeley.edu/evolibrary/article/similarity_hs_01
1. Define homology:
2. Define analogy:
In the image, which pair represents an analogy and which a homology?
2. What is a tetrapod?
3. What are the six bones found in all tetrapod legs?
4. Identify these limbs, to what animal do they belong?
5. What did the common ancestor of all modern tetrapods look
like?
6. Side Trip: "not just anatomy." - How are a bird and a crocodile homologous?
7. Similar structures that evolved independently are called ____________________.
8. a) What is the difference between a marsupial and a placental?
b) What is Smilodon?
c) What is Thylacosmilus?
9. Describe how two unrelated flowers could evolve to have a similar appearance.
10. Are similarities between sharks and dolphins homologous or analogous? Explain.
11. What is morphology?
12. What three criteria are used to determine whether something is a homology or analogy?
13. Fill in the blanks of the primate tree.
14. Considering all of the evidence, are the "wings" (actually flaps of skin stretched between the legs) of sugar
gliders and flying squirrels homologous or analogous structures? Explain why you would conclude this.
15. Sidetrip: See more examples of homology and examples of analogy.
a) How are a Venus fly trap and a pitcher plant homologous?
b) What is unique about bowerbirds?
c) What does the Pax - 6 gene do?
d) What plant gave rise to cauliflower and broccoli?
e) The bones of the ears in mammals are homologous to what in lizards?
Embryological Development: http://www.pbs.org/wgbh/nova/evolution/guess-embryo.html
Make a prediction: Do you think other organisms will have a similar embryologic development as humans? Explain
your reasoning.
For each of the embryos shown, try to guess which organism it will become.
1. Embryo 1 –
a. What was your first prediction? ___________________ were you correct? __________
b. Watch the development of the embryo. On which day does the embryo begin to look different from other embryos?
_______
2. Embryo 2
a. What was your first prediction? ___________________ were you correct? __________
b. Watch the development of the embryo. On which day does the embryo begin to look different from other embryos?
_______
3. Embryo 3
a. What was your first prediction? ___________________ were you correct? __________
b. Watch the development of the embryo. On which day does the embryo begin to look different from other embryos?
_______
4. Embryo 4
a. What was your first prediction? ___________________ were you correct? __________
b. Watch the development of the embryo. On which day does the embryo begin to look different from other embryos?
_______
5. Was your prediction at the beginning of this activity correct? Explain your answer. Use at least one
observation that you made during this activity to support your answer.
http://www.biology-online.org/dictionary/Embryo
1. What is an embryo? (Use the human biology definition.)
2. Use the image above and list two similar features that are seen in the early stages of embryonic
development.
(a) ______________________ (b) _____________________
http://necsi.edu/projects/evolution/evidence/embryos/evidence_embryo.html
3. What did the gill slits in a fish embryo develop in to?
4. How do similarities in developing embryos provide evidence of evolution?
Biogeography Distribution: http://evolution.berkeley.edu/evolibrary/article/0_0_0/lines_11
1. The name Biogeography is an appropriate name for this area of science. Explain in your own words what
biogeography means.
2. According to Wallace and his colleagues, what would explain the evolution of similar but geographically
separate species such as the emu, ostrich, and rhea?