What type of microscope is specially modified with an ultraviolet radiation source and a filter?
A) bright-field
B) dark-field
C) phase-contrast
D) fluorescent
Ans: D) fluorescent
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What muscular disorder is characterized by a progressive weakening of the muscle cells due to a faulty gene on the X chromosome?
a. Polio b. Tetanus c. Muscular dystrophy d. Amyotrophic lateral sclerosis e. Botulism
Molecular chaperones assist in the folding of newly synthesized mRNAs
__________________ Indicate whether the statement is true or false.
If an allele is dominant, then:a
its phenotype is only expressed in heterozygous individuals. b. its phenotype is expressed only in homozygous individuals.. c. one allele can mask the expression of a recessive allele in a hybrid. d. its phenotype is always expressed in all generations. e. its phenotype is more beneficial than the recessive phenotype.
What are the sources of sulfur in the atmosphere?
A) Mostly (over 90%) volcanoes and photosynthetic bacteria B) Mostly transportation modes, such as autos, trucks, and planes C) Volcanoes and hot springs, but mostly (about 75%) human activities such as burning coal D) Decomposition and small amounts from pollution E) Natural and human sources, in equal amounts