Which of the following disorders is described as follows: damage to motor nerves innervating skeletal muscle; skeletal muscles weaken; death usually results within five years of diagnosis?
A) amytrophic lateral sclerosis
B) pleurisy
C) cystic fibrosis
D) emphysema
E) botulism
A
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The half life of Carbon 14 is approximately
____ years.
a. 16,000,000 b. 60,000 c. 8,200 d. 5,400 e. 500
Which statement best describes the limitations of using of humans in genetic studies of developmental biology?
A) The variation in human development between individuals is too large for genetic studies. B) It is impractical and unethical to conduct experimental manipulation or targeted mutagenesis of humans to examine the role of genes in development. C) It is impractical and unethical to examine and describe abnormalities of human development, such as birth defects. D) Genetic studies of human development are not necessary, because most problems in human development are due to environmental influences and not genetics.
The transforming principle discovered by Griffith is RNA
Indicate whether the statement is true or false
A eukaryotic chromosome consists of _____.?
Fill in the blank(s) with correct word