Which of the following is not an essential feature of electron transfer from water to NADP+?
A) photosystem II complex
B) photosystem I complex
C) coenzyme Q
D) plastocyanin (PC)
E) cytochrome b6/f complex
C) coenzyme Q
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Which animal in not a natural host for E. coli O157:H7?
a. Goats b. Deer c. Humans d. Sheep e. Cows
A fish circulatory system is indicated by the letter (s) ____
a. A only b. B only
c. C only d. both A and B e. both B and C
All of the following are ways in which scientists can transfect an organism EXCEPT
A) spraying plants with herbicide containing new genes. B) infecting a host organism with a virus carrying a new gene. C) using a "gene gun" to shoot genes into cells in culture. D) injecting DNA into an egg using a small, sharp pipette.
Which of the following reproductive barriers actually prevents individuals of different species from mating with each other?
a. gametic isolation b. behavioral isolation c. hybrid sterility d. hybrid breakdown e. hybrid inviability