The Permian mass extinction is hypothesized to have been caused by volcanic eruptions resulting in:
A. global warming, lack of oxygen, and ocean
acidification.
B. ocean acidification.
C. lack of oxygen.
D. global warming.
E. global warming and lack of oxygen.
A
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The largest reservoir of water is the ____
a. oceans b. polar ice and glaciers c. groundwater d. lakes and rivers e. atmosphere
Which RNA molecule carries the sequence of nucleotides that determines the order of amino acids in a protein?
A) transfer RNA B) ribosomal RNA C) messenger RNA D) translator RNA
Which of the following statements best explains why dominant alleles that cause lethal disorders are less common than recessive alleles that cause lethal disorders?
A) Lethal disorders caused by dominant alleles are usually more severe than lethal disorders caused by recessive alleles. B) Unlike lethal disorders caused by recessive alleles, lethal disorders caused by dominant alleles usually cause the death of the embryo. C) Most individuals carrying a lethal dominant allele have the disorder and die before they reproduce, whereas individuals carrying a lethal recessive allele are more likely to be healthy and reproduce. D) The presence of a lethal dominant allele causes sterility.
A patient has an upper GI endoscopic procedure and later develops a severe (endogenous/iatrogenic/secondary) infection with the Gram-negative pathogen known as CRE
What will be an ideal response?