Which of the following scenarios involves the introduction of a potentially invasive species? I. The migration of spiders in fruit shipped to the United States from South America
II. The escape of a rattlesnake from a zoo exhibit
III. Picking flowers while on vacation in California and planting them in your garden in Texas
Answers: I and II only. I and III only. II and III only. I, II, and III

answer 1 and 3 only

Explanation:

Spiders not from the US can potentially take over other species habitats. Same with flowers not from a specific area.

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

the question isn't complete here so i can't right an answer '_'