To be classified as a eukaryote, an organism must have
A) centrioles.
B) a cell wall.
C) flagella.
D) internal membranes.
E) sexual reproduction.
D
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The female homolog of the glans penis is the:
A. clitoris B. labia minora C. labia majora D. vulva E. vagina
Early in development, female mammalian embryos convert an X chromosome in each cell into an inactivated form. What is this form called?
a. neutral X b. odontoid process c. Barr body d. axial body
Mucus secreted by mucous membranes provides protection against infections by
A) forcing the pathogen to die in the struggle to free itself (like a fly strip). B) trapping and removing pathogens. C) phagocytosing pathogens by macrophages. D) destroying pathogens by the complement system. E) drowning the pathogen.
In photosynthesis, the chemiosmotic production of ATP
A) requires oxygen. B) is similar to the production of ATP in mitochondria. C) is done by the Calvin cycle. D) is a result of the oxidation of glucose.