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SA1e. (1 pt) Categorize the following statement as being science or non-science: “Tranquilizing/tagging wolves is immoral as it interferes with their nature life cycle.”

Animal cells have diverse types of cytoskeleton including all of the following EXCEPT

SA1a. (4 pts) Propose a plausible/reasonable hypothesis for why dogs/wolves would roll in stinky things:

What is the appropriate order of the stages of investigating whether maple trees drop their leaves in the autumn because of colder days?    (1) Maple trees are grown in two greenhouses where the only variable is temperature (15°C vs. 10°C).  (2) The hypothesis is rejected.  (3) There is no statistical difference in the number of leaves dropped at 10°C as compared to 15°C.  (4) The observation is that maple trees drop their leaves in autumn.  (5) The hypothesis is that maple trees drop their leaves because of colder temperatures.

Researchers move a set of salamanders to a larger island with shrubs. They intentionally choose salamanders with three body sizes to move: small, medium, and large.  They wanted to understand the strength of natural selection acting on body size. Use the table below to calculate the selection coefficient for the large phenotype. Phenotype: Large Medium Small Chance of survival to mating: 25% 50% 10% Number of offspring if survive: 10 20 10 Fitness (average for an individual with that phenotype): 0.25 x 10 = 2.5 0.5 x 20 =10 0.1 x 10 = 1 Relative fitness: ? ? ? Selection coefficient: ? ? ?

Short Answer D.  (4 pts) In addition to summarizing the laws of segregation and independent assortment, we also looked how phases of meiosis can explain why these laws occur.  What phase(s) of meiosis are responsible for these laws and explain how what is happening mechanistically in that stage is the basis for each law?

Changes in eukaryotic chromatin structure

Week 8: Gene Regulation

You’ve transformed Agrobacterium tumefaciens with a modified Ti plasmid.  Within the T-DNA boundaries, the plasmid carries no gall-inducing genes but DOES contain a general plant promoter upstream of a gene of interest that you’d like to transfer to the plant.  What would you expect to happen if these engineered Agrobacteria were placed on a plant at the site of a wound? 

The presence of ____ in an E. coli cell induces CAP at the CAP binding site and activates transcription of the lac operon resulting in _____ of lacZ expression.