The mechanical behavior of electrospun scaffolds

Comment on:
1) Tensile Test (Stress/ Strain) Graphs.
2) Fibre Diameter And Porosity (%) and Pore Size.
3) Contact Angle of The Scaffolds average, which indicate the Wettability of the Scaffolds

• Comments and discussion on how those scaffolds behave are they suitable to use in tissue engineering?
• What are the mechanical properties from the tests etc.
• All results and graphs should be included, which I have already uploaded.


The dark morphs

1. After one generation, how many dark morphs are still alive for mating, and how many light morphs? How many moths are alive total?

2. What is the dark frequency among the survivors? (#dark/#total survivors x 100)

3. If the survivors of this generation all end up having 2 offspring that look just like them, and then die after reproducing, how many light and dark moths are there in the next generation?

4. Using the same survival rates above, how many dark and light survivors are there in the next generation (round up to the nearest whole moth)? What is the dark frequency?

5. Fill in the table below following the steps above for several generations. Is the shift in the dark frequency after 20 generations a big shift? Note that I filled in the answers for questions 1-3, so make sure that your answers match those given below.

Generation # light at start #dark at start #light survived #dark survived Total Survivors %light morph %dark morph
1 900 100 405 55 460 88.0% 12.0%
2 810 110
Generation # light at start #dark at start #light survived #dark survived Total Survivors %light morph %dark morph

6. Using the data from above, graph the %light and %dark moths by generation below.

Cladogram showing the relationship between Sharks, Lungfish, Placoderms, Salamanders, Dinosaurs, Birds, Opossums, Horses, and Cats. ©2015 Cengage Learning, Figure 7.14b, page 142.

7. Let’s do a couple simple examples together, and we will do some more complicated ones. Below (Figure 4) are three possible cladograms showing the relationship between dogs, birds, and bats. In case you didn’t know, despite the ability to fly, bats, like dogs, are mammals, and are not related to birds. Given this, circle the correct cladogram that reflects that relationship.

8. In the above cladogram, who is the closest relative of the primate group?

9. Who is the closest relative of the spider monkey?________________________________

10. Who is the closest relative of the crocodile?___________________________________

11. Is the giant deer more closely related to the crocodile or the spider monkey?











Sample Solution