As urine exits the body, it passes from the urinary bladder and out via the__________.
Fill in the blank(s) with correct word
Answer: urethra
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Chloroplasts and mitochondria are thought to be of prokaryotic origin. One piece of evidence that supports this hypothesis is that these organelles contain prokaryotic-like ribosomes. These ribosomes are probably most similar to ribosomes found _______.
Fill in the blank(s) with the appropriate word(s).
E. coli is a good model system for molecular biology studies because
a. it has a small genome. b. it reproduces rapidly. c. mutants can easily be isolated from culture dishes. d. All of the above
The portion of tooth that projects above the gums is called the
A. enamel. B. pulp. C. dentin. D. crown. E. cementum.
Calcium levels are primarily under the control of
a. calcitonin and thyroxine. b. parathyroid hormone and calcitonin. c. prolactin and oxytocin. d. parathyroid hormone and thyroxine. e. progesterone and ADH.