Gene therapy has been used successfully to treat which of the following genetic disorders in humans?
a. hemophilia A
b. cystic fibrosis
c. SCID-X1
d. retinal disease
c
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What is the major difference between animals and fungi in how they obtain nutrients?
What will be an ideal response?
Of the following, which is the best description of the mutual benefit to both species found in a lichen?
A. The autotroph produces antibiotics to ward off infection by bacteria. B. The autotroph prevents dehydration and the heterotroph provides a carbon source. C. The autotroph provides a carbon source and the heterotroph absorbs moisture and minerals. D. The autotroph produces oxygen and the heterotroph consumes oxygen. E. The heterotroph protects the autotroph from predation.
The capillaries clustered around kidney tubule
cups differ from other capillaries in that they
a. have a much wider diameter. b. are much leakier. c. have arterioles at either end. d. carry lymph with blood. e. have more than one of these characteristics
If a flagellum is analogous to the cell, which of the following is analogous to the animal body?
a. a muscle system b. a nervous system c. a reproductive system d. a digestive system