Data from what source led to the hypothesized relationship between the Craniata and nonvertebrate chordates?
A. the vertebrae.
B. DNA.
C. rRNA.
D. external features.
C. rRNA.
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Type I and Type 2 diabetes mellitus have different underlying causes. Type I diabetes is characterized by a loss of the insulin-producing cells of the pancreas, leading to insulin deficiency
Type II diabetes, at least in its early stages, is characterized by a loss of sensitivity to the hormone insulin by cells that normally respond to the hormone. Which step labeled in the diagram is inhibited in BOTH type 1 and type 2 diabetes (either directly or indirectly)? A. glycogen synthesis B. hormone release C. sensory input to the pancreas D. glycogen hydrolysis
Some cyanobacteria form ________, which are comprised of chains of bacterial cells that are in close contact with one another over a large area.
A. mycelia B. trichromes C. cell mats D. hypha
The maximum life expectancy for a patient with cystic fibrosis is approximately
a. 15 years. b. 20 years. c. 25 years. d. 30 years. e. 50 years.
Ideally, what should an experiment studying the effect of a cold medicine have?
A) no control group B) double-blind procedures C) a small sample size D) subjects of only one gender