45. Which of the following sex and generation combinations directly produces the pollen tube of angiosperms? (A) female gametophyte (B) male sporophyte (C) male gametophyte (D) female sporophyte

10. Coagulation is a delicate mechanism controlling clot formation and preventing blood drainage. What kind of dietary deficiency and clotting factor deficiency would lead to defective blood clotting and hemophilia A? (A) vitamin E; factor VIII (B) vitamin B12; factor VIII (C) vitamin E; von Willebrand factor (D) vitamin B12; von Willebrand factor (E) vitamin K; factor VIII

45. Which of the following sex and generation combinations directly produces the pollen tube of angiosperms?
(A) female gametophyte
(B) male sporophyte
(C) male gametophyte
(D) female sporophyte

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