Someone suffering from anorexia nervosa may experience which of the following physical symptoms? [Select all correct responses]
A. esophageal damage
B. teeth erasion
C. cessation of mensturation
D. decreased thermoregulation
E. both C & D
Answer: E. both C & D
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Blood vessels that have thinner walls that are more likely to collapse when blood is withdrawn during a venipuncture are
a. Capillaries b. Veins c. Arteries d. Lymphatics
In Drosophila melanogaster there is a sex-linked gene for eye color that is found only on the X
chromosome. The allele for red eye color (Xw+) is dominant over the allele for white eye color (Xw). You examine a vial of 100 flies that are all offspring from a single genetic cross. You find only redeyed females and red-eyed males present. Flies from the vial were allowed to interbreed, and in the next generation you find only red-eyed females, but you find both red-eyed and white-eyed males. The genotypes of the original parents were
a. Xw+Xw+; XwY. b. Xw+Xw; XwY. c. XwXw; Xw+Y. d. Xw+Xw; Xw+Y. e. XwXw; XwY.
The letter “B” in the above figure represents
a. trigger zone. b. output zone. c. input zone. d. conducting zone. e. none of these.
What is the phenotypic ratio of monohybrid cross between two heterozygous parents?
A.) 3:1 B.) 1:2:1 C.) 9:3:3:1 D.) 1:2:2:1