Final answer:
Praying mantises have a single ear located on their abdomen, making the answer B. One. Nitrogen has two electron shells due to its atomic structure, so the answer is b. two.
Step-by-step explanation:
Praying mantises do not have traditional ears like mammals. Instead, they have a single ear located on their abdomen, specifically on the ventral side between the legs. Therefore, the correct answer to how many ears a praying mantis has is: B. One.
As for the second question regarding the atomic structure of nitrogen, with an atomic number of seven, nitrogen atoms have two electron shells. The innermost shell can hold up to two electrons, and the second shell can hold up to eight electrons. Nitrogen has five electrons in its outer shell, hence the second shell is its outermost shell, making the answer: b. two.