As part of your senior thesis, you are to isolate an apoptosis inhibitor from plants. You believe you have found such a molecule. If you treat plant embryos with your putative apoptosis inhibitor, which of the following structures would not be formed correctly?
A. phloem
B. tracheids
C. sieve tube elements
D. companion cells
E. epidermis
B. tracheids
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If a human female has 2 Barr bodies per cell, it is almost certain that
A. her father had 1 Barr body per cell. B. her mother also had 2 Barr bodies per cell. C. she developed from a fertilized egg with 3 X chromosomes. D. she is genetically a male with female characteristics. E. she is genetically a normal fertile female.
Why are most X-linked disorders recessive?
a. X-linked dominant disorders are always fatal to females b. females only have one active X- dominant disorders would render them sterile c. dominant X-linked disorders are almost always fatal to the male embryo d. dominant X-linked disorders, regardless of their overall effect, prevent proper sperm formation e. more than one of these is the reason why most X-linked disorders are fatal
The organism in the above photograph has
which of the following structural systems? a. cartilaginous b. bone c. hydrostatic d. chitinous e. none of these
If the kidneys cannot excrete enough acid, which condition occurs?
a. metabolic alkalosis b. respiratory acidosis c. metabolic acidosis d. respiratory alkalosis e. compensatory alkalosis