Fe cycle of the bacteria can be determined based on the internal color of the nodule. What does green indicate? Question 6 options:

the bacteria are actively fixing-nitrogen

the bacteria are dying due to the increase in nitrogen

the bacteria are actively reproducing

the bacteria are turning the root cells back into nitrogen gas

Read the following scenario to answer the following question. in some zoos, rare crosses between a male lion and a female tiger have produced hybrid offspring called "ligers." male ligers are sterile but some female ligers are fertile. in the wild, lion and tiger ranges do not naturally overlap, making such a cross unlikely. furthermore, the solitary behavior of tigers and the social organizations of lions create behavioral differences. applying the biological species concept, the sterility of ligers reveals that a. lions are probably a subspecies of tigers b. tigers and lions are the same species c. a new species called "ligers" is forming d. tigers and lions are separate species

What best describes lactic acid fermentation?

Which is an important function of normal flora? a. aid with bone marrow production. b. crowd out pathogenic bacteria. c. destroy digestive track pathogens. d. manufacture iron in the bloodstream.