What are 4 distinguishing characteristics that separate animals from other organisms?
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Animals are multicellular, eukaryotic, and lack cell walls. They cannot produce their own food and with the exception of adult sponges, can actively move.
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Site-specific recombination occurs between homologous sequences of DNA
Indicate whether the statement is true or false
The lining of the uterus is called the:
a. diaphragm. b. endothelium. c. endometrium. d. hymen. e. cervix.
A patient at a clinic complains of diarrhea that is occasionally bloody and has persisted for several days. A microscopic examination of a stool sample reveals the presence of very round cysts. These signs are consistent with infection by
A) Entamoeba histolytica. B) Enterobius vermicularis. C) Balantidium coli. D) Giardia intestinalis. E) Trypanosoma cruzi.
Each protein complex in the electron transport chain receives electrons and pumps H+ into the
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