Which of the following leads to the occurrence of vertebrate sense organs?
A. both adrenal medullary cells and sympathetic neurons derive from the neural crest
B. neural crest cells form both neurons that carry messages and cartilaginous bars
C. the neural crest and associated sensory ganglia
D. formation of the endoderm
E. formation of the autonomic nervous system
C. the neural crest and associated sensory ganglia
You might also like to view...
Bacteria reproduce by:
a. meiosis. b. cell fusion. c. binary fission. d. cloning. e. auxospore formation.
Three species of tigers have gone extinct due to overharvesting or habitat destruction. This is an example of
A. mass extinction. B. adaptive radiation. C. sympatric speciation. D. increased extinction rate by human activity. E. background extinction rate.
Which characteristic is associated with hardwood species?
a. thick cuticles b. susceptibility to periodic fires c. needle-shaped leaves d. recessed stomata e. adaptations for conserving water
Several members of the same family were diagnosed with the same kind of cancer when they were unusually young
Which one of the following is the most likely explanation for this phenomenon? It is possible that the individuals with the cancer have _______________________. (a) inherited a cancer-causing gene that suffered a mutation in an ancestor's somatic cells. (b) inherited a mutation in a gene required for DNA synthesis. (c) inherited a mutation in a gene required for mismatch repair. (d) inherited a mutation in a gene required for the synthesis of purine nucleotides.