The major function of the body of the vertebra is
A) transferring weight along the axis of the vertebral column.
B) allowing twisting motions.
C) protection of the spinal cord.
D) providing support.
E) providing a passageway for nerves.
A) transferring weight along the axis of the vertebral column.
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You digest DNA from the frog Xenopus laevis with the enzyme NotI that produces sticky DNA ends. You can ligate your DNA to:
_____ blunt AluI ends from Xenopus laevis. _____ sticky NotI ends from Xenopus laevis. _____ blunt AluI ends from bacteria. _____ sticky NotI ends from bacteria. _____ sticky EcoRI ends from Xenopus laevis. _____ sticky EcoRI ends from bacteria.
Why doesn't the stomach acid just digest right through the wall of the stomach?
A. The lining of the stomach is protected by mucus. B. Food prevents the acid from digesting the wall of the stomach. C. The pH of the stomach acid is not low enough to be able to digest the lining. D. Neutralizers are imbedded in the stomach lining. E. It does, we just rebuild the layers faster than they can be digested.
Which of the following characteristics indicates that Tiktaalik was an intermediate form between fish and amphibian?
a. The fossil reveals the presence of true lungs, with no gills present. b. Evidence suggests that the eyes were forward facing, similar to a terrestrial predator. c. The attachment of the fin bones to the shoulder suggest that they might be weight bearing. d. The DNA evidence shows that Tiktaalik’s enzymes were adapted for terrestrial habitats.
If two parents are heterozygous for an autosomal recessive disease,
considered genetic carriers for the disease. b. their children have no chance of inheriting the disease. c. their children have a 50 percent chance of inheriting the disease. d. all of their children will also be heterozygous.