Answer :
Final Answer:
About B) 2 questions are needed in this dichotomous key to determine if the unknown is Bacteroides.
Explanation:
In a dichotomous key, each question or statement in the key is designed to divide the set of organisms into two distinct groups based on certain characteristics. The goal is to narrow down the possibilities and arrive at the correct identification. In this case, two questions are needed to determine if the unknown is Bacteroides.
Let's consider the possible scenarios:
- First Question (1st Split): The key may start with a question that distinguishes Bacteroides from other organisms. If the answer is affirmative, the key moves to a second question to further refine the identification. If the answer is negative, the key directs to a different set of questions for a different organism.
- Second Question (2nd Split): The second question is crucial for confirmation. If the first question narrowed down the options but did not exclusively identify Bacteroides, the second question will provide the necessary differentiation. If the answer is affirmative, the identification is likely Bacteroides. If the answer is negative, it may lead to the identification of another organism.
In summary, B) two questions are necessary to adequately distinguish and identify Bacteroides within the dichotomous key. The first question reduces the options, and the second question confirms the specific characteristics of Bacteroides. This approach ensures a precise and accurate identification process in dichotomous keys.
