The HOBBIT gene in an embryo helps to control the development of what structure?
A. cotyledon
B. endosperm
C. root
D. epicotyl
E. root hair
C. root
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Which of the following is associated with the lubrication of joints?
A) chondroitin sulfate B) lignins C) hyaluronate D) keratan sulfate E) pectins
Some members of an animal society may have greater success at reproduction as a result of:
a. dominance hierarchy. b. sexual selection. c. reproductive isolating mechanisms. d. reproductive isolating mechanisms along with sexual selection. e. dominance hierarchy along with sexual selection and reproductive isolating mechanisms.
The primary risk to humans infected with Echinococcus granulosus is
A) development of cysticerci. B) formation of hydatid cysts. C) intestinal obstruction. D) anemia. E) infection of the fetus.
When constructing a phylogeny based on morphological and molecular data, there can be many ways of positioning the organisms in the phylogenetic tree. One concept that scientists apply to help them in this task is 'maximum parsimony', which means that