19. Changing nitrogen gas into a more reactive form (so organisms can use it) is called:
A. Denitrification
B. Nitrogen fixation
C. Nitrification
D. Decomposition

Plant species a has a diploid number of 12. plant species b has a diploid number of 16. a new species, c, arises as an allopolyploid from a and b. the diploid number for species c would probably be a) 12. b) 14. c) 16. d) 28. e) 56.