Which of the following is not evidence supporting the Lyon hypothesis of X inactivation?
A. Female mammals that are heterozygous for X-linked traits are phenotypically mosaics.
B. A highly condensed structure is consistently observed in female cells, but not in male cells.
C. A female cat that is homozygous for coat color cannot produce calico offspring.
D. Calico patterns of coat color are never exactly the same.
E. A genetically normal male cat can never be calico.
E. A genetically normal male cat can never be calico.
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Which of the following are NOT found in the gastrointestinal tract of healthy humans?
A) Bacteroides B) Clostridium C) Escherichia coli D) protists
Which is true about guncotton?
a. it is a highly explosive derivative of cholesterol. b. it is used to make gunpowder. c. it is less stable than gunpowder d. it has a higher activation energy for a reaction with oxygen than gunpowder e. more than one of these is correct
Reversible phenotypic changes in an individual organism in response to changing environmental conditions are referred to as ________
Fill in the blank(s) with correct word
The importance of toxic chemicals in the workplace is only because of its potential to cause long-term disability or death.
Indicate whether the statement is true or false.