Given that a human normally contains 46 chromosomes, give the chromosome number for each of the following conditions:
Turner syndrome (female, no Barr bodies)
Klinefelter syndrome (male, one Barr body)
triploid
Down syndrome (trisomic)
trisomy 13
Turner syndrome (female, no Barr bodies) 45
Klinefelter syndrome (male, one Barr body) 47
triploid 69
Down syndrome (trisomic) 47
trisomy 13 47
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Reabsorption is the movement of water and solutes
from the __________ to the __________. a. interstitial fluid; tubules b. glomerular capillaries; Bowman’s capsule c. Bowman’s capsule; nephron tubules d. nephron tubules; peritubular capillaries e. glomerular capillaries; peritubular capillaries
Which of these is the most common compound in the cell walls of gram-positive bacteria?
a. cellulose b. peptidoglycan c. lipopolysaccharide d. lignin e. proteinoid
The bones in the forelimbs of vertebrates ____.
A. can often be traced to a common ancestor B. offer no evidence to support the theory of evolution C. perform the same function no matter which species they are in D. may exhibit either analogy or homology but not both when compared to the forelimb of another animal E. show convergence with some invertebrate structures
If you hear a friend call someone a "Neanderthal," why might it conceivably be a compliment?
A) Neanderthals cared for the old and sick. B) Neanderthals were more creative than modern people. C) Neanderthals had better tools than the modern species. D) Neanderthals were more lightly built than modern people and therefore physically more attractive.