Use the dichotomous key shown below to identify the plant shown in the picture above. 1.a. leaves have sharp, thornlike spines along their edges american holly. 1.b. leaves do not have sharp, thornlike spines along their edges go to 2. 2.a. has three or more leaflets growing from a single point go to 3. 2.b. does not have three or more leaflets growing from a single point greenbrier. 3.a. has a total of three leaflets growing from a single point eastern poison ivy. 3.b. has a total of five leaflets growing from a single point virginia creeper. a. american holly b. eastern poison ivy c. greenbrier d. virginia creeper

The correct answer is option B. "eastern poison ivy".

Explanation:

By looking at the characteristics of the leave shown in the picture and following the dichotomous key, we can determine that the plant shown in the picture belong to eastern poison ivy. First, we determine that the leaves do not have sharp, thornlike spines along their edges. Second, it is true that the plant has three or more leaflets growing from a single point. Third, it is true that the plant has a total of three leaflets growing from a single point. With this information we can determine that the plant in the picture corresponds to eastern poison ivy. I attached the missing picture.

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explanation:

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.