Which of the following statements about homologous genes is true?
(a) For protein-coding genes, homologous genes will show more similarity in their amino acid sequences than in their nucleotide sequences.
(b) Fewer than 1% of human genes have homologs in the nematode and the fruit fly.
(c) Most homologous genes arose by gene duplication.
(d) A gene in humans that has homologs in plants and prokaryotes will show the same level of similarity in nucleotide sequence when the human and prokaryotic sequences are compared as when the human and chimpanzee sequences are compared.
(a) Because of the degeneracy of the genetic code, nucleotide sequences can diverge but still code for identical amino acids.
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When an enzyme linked receptor is activated, a conformational change activates the extracellular
kinases. __________________ Indicate whether the statement is true or false.
While a backhoe operator is helping to clear land that will be used for a poultry farm, the equipment opens up a hidden chamber in which old electrical transformers have been buried. The operator knows that transformers contain PCBs
Why should this person warn the owners of the land?
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