Which scientist is given credit for proposing the endosymbiont theory?
A. Svante Arrenhius
B. Charles Darwin
C. Stanley Miller
D. Louis Pasteur
E. Lynn Margulis
E. Lynn Margulis
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The letter "C" in the figure above represents
a. root apical meristem. b. dermal tissue. c. vascular tissue. d. ground tissues. e. ground, dermal, and vascular tissues
Territory marking is common in canids and felines.
Answer the following statement true (T) or false (F)
A urine specimen from a maternity patient with the complaint of cystisis was recieved in the lab. The culture of tis sample grew a lactose- positive. Gram negative bacillys that was presumtively identified as E. Coli. On differential and selective media this organism would demonstrate which reaction?
A. Hektoen Enteric Agar= green/colorless colonies with black centers B. MacConkey Agar= Colorless colonies C. xylose-lysine-Desoxycholate Agar= yellow colonies D. Xylose-Lysine Desoxychocolate Agar= colorless colonies
What type of molecule activates cytotoxic T lymphocytes?
A) perforin B) cytokines released from T helper cells C) antibodies D) antigen presented with MHC I