13. Which of the following is an important source of endotoxin in gram-negative species? (A) endospore. (B) sex pilus. (C) flagellum (D) cell wall

2. Genetically engineered plants (A) are more difficult to engineer than animals. (B) include a transgenic rice plant that can help prevent are more difficult to engineer than animals t vitamin A deficiency. (C) are being rapidly developed, but traditional plant breeding programs are still the only method used to develop new plants. (D) are able to fix nitrogen themselves

13. Which of the following is an important source of endotoxin in gram-negative species?
(A) endospore.
(B) sex pilus.
(C) flagellum
(D) cell wall

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