The condition where tissue from the uterine lining grows outside the uterus is called ______________
A. endometriosis
B. pelvic inflammatory disease
C. uterine prolapse
D. ectopic pregnancy
Answer: A. endometriosis
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Which of the following cell junctions are associated with the proper alignment of intestinal epithelial cells?
A) gap junctions B) adhesive junctions C) tight junctions D) desmosomes E) all of the above
Match the terms with the labeled structures on the diagram. 
nucleus
Fill in the blank(s) with the appropriate word(s).
The mutant fly in Figure 17-2 illustrates all of the following except:
a. the existence of homeotic genes in Drosophila.
b. the concept of nuclear equivalence.
c. mutations in genes affecting segment identity.
d. an altered phenotype due to a mutant allele.
e. a structure containing many nuclei residing in a common cytoplasm
Sickle-cell anemia is caused by the absence of the alpha chain of hemoglobin
Indicate whether the statement is true or false