Water reabsorption into the capillaries associated with a nephron is achieved principally by
a. bulk flow.
b. active transport and diffusion.
c. countercurrent multiplication.
d. phagocytosis.
e. endocytosis.
B
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Which of the following is a febrile disease characterized by a rash and is caused by a virus that can cross the placenta to cause serious fetal damage?
A. Shingles B. Measles C. Rubella D. Smallpox E. Impetigo
Which group of gymnosperms has only a single living representative species?
A. cycads B. ginko C. conifers D. gnetophytes E. lycopodium
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
Elephants are killed for their tusks and rhinos for their horns. This is an example of __________ for traditional
medicine and ornaments. Fill in the blank(s) with the appropriate word(s).