Which of the following are examples of post-zygotic barriers? I.  Gametic isolation II.  Mechanical Isolation III.  Reduced hybrid viability     I only     II only     III only     I and II     I and III     II and III     I, II and III

1. The image shows a model of a reproductive strategy of an 2. The bird in the picture feeds on mice. A major forest fire resulted in a layer of ash that darkened the soil on which the mice lived. The illustration shows the distribution of mice over time. organism. What type of reproduetive strategy is shown in the model Make a claim about why the color distribution in the mouse population changed over time. Provide evidence to support and what is an evolutionary disadvantage of it? your claim. 1 2 3 Number of Weeks after the Forest Fire

Questions 1-3 refer to the pedigree below that represents the presence of PTC tasting in a D.C. area family. PTC tasting is inherited through a dominant allele (T). The genotype of person #1 is: O a. TT O b.Tt O C.T? O d.tt O e.?t

Horizontal transmission does rarely occur with genes but it be orders of magnitude faster with cultural traits .What does this statement mean ????