Some sharks and tunas possess a ________, a blood circulation system that allows them to keep internal temperatures higher than external temperatures
Fill in the blank(s) with correct word
rete
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Where does cellular respiration occur?
A. In the chloroplasts B. In the mitochondria C. In the airways of the respiratory system D. In the nucleus
The unique antigen-reactive proteins of T cells are
A) antibodies. B) immunoglobins. C) T cell receptors. D) None of these is correct.
Which of the following characteristics is(are) a basic property of cells?
A) cells posses a genetic program and the means to use it. B) Cells are capable of producing more of themselves C) cells are highly complex and organized D) cells acquire and utilize energy E) all of the choices are correct
A young woman being treated for serious burns develops severe diarrhea accompanied by intense abdominal pain. She passes several watery, foul-smelling, bloody stools a day. A colonoscopy reveals patches of yellowish lesions in the large intestine. The
probable causative agent is A) Giardia intestinalis. B) Clostridium difficile. C) Campylobacter. D) Salmonella enterica serotype Typhi. E) Vibrio cholerae.