What are the main components of the central nervous system?
Brain and cranial nerves
Autonomic and somatic
Spinal cord and brain
Spinal nerves and spinal cord
C. Spinal cord and brain
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Which of the following correctly describes the path of urine from formation to excretion in the mammalian kidney?
A. collecting duct ? renal pelvis ? ureter ? urinary bladder ? urethra B. renal pelvis ? ureter ? urinary bladder ? urethra ? collecting duct C. ureter ? collecting duct ? renal pelvis ? urinary bladder ? urethra D. collecting duct ? ureter ? urinary bladder ? renal pelvis ? urethra E. urethra ? collecting duct ? renal pelvis ? ureter ? urinary bladder
The acid growth hypothesis links
A. oligosaccharins to pH changes. B. cytokinin to thigmonasty. C. auxin to cell wall expansion. D. gibberellin to root elongation. E. ethylene to leaf abscission.
The phase change of an apical meristem from the juvenile to the mature vegetative phase is often revealed by _____
A) a change in the morphology of the leaves produced B) the initiation of secondary growth C) a change in the orientation of preprophase bands and cytoplasmic microtubules in lateral meristems D) the activation of floral meristem identity genes
Fossil evidence of Neanderthals have been found in the following areas except ______.
A. the Middle East? B. Europe C. Asia D. Siberia E. Australia