Which sex chromosome combinations would you expect to find in a male calico cat?
a. XX
b. XXY
c. XYY
d. XY
Ans: b. XXY
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National parks are an important part of our heritage,
A. and they remain pristine and undisturbed because of their park status. B. but they lack any protection from mining, logging, and grazing. C. but they are endangered by overcrowding, pollution, and in some places, mining. D. that unfortunately exist only in remote inaccessible areas. E. but they are endangered by overcrowding.
A nucleosome consists of DNA wrapped around scaffolding proteins
__________________ Indicate whether the statement is true or false.
Sugar is translocated in phloem from a source, or an area of ____, to a sink, or an area of ____
a. low sugar concentration; high sugar concentration b. high sugar concentration; low sugar concentration c. positive water potential; negative water potential d. negative water potential; positive water potential e. low pressure; equally low pressure
If the ureter was blocked due to the development of a tumor preventing the normal flow of urine, which region of the kidney would be impacted first?
A. distal convoluted tubule B. collecting duct C. proximal convoluted tubule D. glomerular capsule E. renal cortex