Nematocysts are found only in
a. cnidarians.
b. roundworms.
c. crustaceans.
d. echinoderms.
e. arthropods.
A
You might also like to view...
As a transitional form, Archaeopteryx is important because it provides insight into
a. the evolution of birds into reptiles. b. the relationship between dinosaurs and birds. c. adaptations for animals moving from an aquatic to a land environment. d. all of these
The letter “A” from the above figure represents
a. ectoderm. b. endoderm. c. mesoderm. d. neural plate. e. all of these.
____________ are corkscrew-shaped bacteria with wriggly movement caused by the activity of axial filaments.
A) Bacilli B) Cocci C) Spirilla D) Spirochetes
Charcot-Marie-Tooth is the most commonly inherited peripheral neuropathy, and has no known cure. Patients suffer damage to motor and sensory neurons, leading to degeneration of muscles and gradual loss of motor control.Mutation of the peripheral myelin protein 22 (PMP22) gene, which causes demyelination of peripheral neurons, is a more common cause of Charcot-Marie-Tooth disease. In which cells is the function of the PMP22 gene important for normal function?
A. Schwann cells B. Peripheral neurons C. Fibroblasts D. Astrocytes E. Oligodendrocytes