Body parts derived from ectoderm include the 

Female boa constrictors (a type of snake) have one of the sex chromosome called a Z chromosome and one called W. Females are the __________ sex; therefore males are the __________ sex.

According to a new study, the number of cases of whooping cough has steadily increased since 2008 peaking in 2010. The rate of voluntary vaccine withdrawal (not receiving a vaccine shot) for whooping cough increased from 2007 to 2010.  Whooping cough vaccine has a known effect on the number of whooping cough infections, and a large majority of individuals were not vaccinated. Which would best explain the relationship between whooping cough infections and vaccine withdrawal?

The cell cytoskeleton can use proteins for movement, shape, and support. These include ________________, microfilaments, and/or intermediate filaments.

The structures below would be best described as   

For each of the following areas, outline how genetics contributes to this field. Be sure to include an example for each.  Agriculture: Health Care: Ecology:

Which of the choices are listed from smallest to largest, or lowest to highest level of organization?

Choose the correct pattern (or mode) of inheritance for the following pedigree:

 To ensure proper replacement, stems cells divide by meiosis when differentiating into somatic cells. 

Stem cells made from reprogrammed cheek cells would most likely be considered a(n)