Animals, fungi, and many bacteria that use organic molecules as a source of both energy and carbonare:a
photoautotrophs.
b. catabolic autotrophs.
c. chemoheterotrophs.
d. photoheterotrophs.
e. chemoautotrophs.
C
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Which of the following choices best describes the genetic engineering used to prevent rejection of xenotransplants?
1.Transgenic pigs carrying human genes donate organs to patients who also receive bone marrow transplants from the donor pig. 2.Hyperacute rejection of MHC proteins from animal donors is prevented by the use of cloned animal tissues lacking MHC markers. 3.Transgenic pigs carrying human genes donate organs to patients who also receive bone marrow transplants from the donor pig, resulting in chimeric immune systems. 4.A bone marrow transplant from the human patient to the donor pig affects MHC proteins on the pig organs, reducing the severity of xenotransplant rejection.
Did H. sapiens mate with H. neanderthalensis? How do we know? What will be an ideal response?
A chemical agent that dissolves lipids can damage
A) cells. B) bacterial endospores. C) enveloped viruses. D) nonenveloped and enveloped viruses. E) cells and enveloped viruses.
Mixed acid fermentation is characteristic of which taxonomic group?
a. enterics b. pseudomonads c. spore-formers d. syntrophs