“popping” of the ears is often experienced when taking off on a plane flight because pressure changes in the ear cause slight displacement of the tympanic membrane. which of the following is caused by displacement?

a. the middle bone of the ear cannot move, temporarily.
b. the calcareous structures in the inner ear cannot move, temporarily.
c. the hollow tube in the inner ear that contains the sensory organs of hearing changes position.
d. the thin membrane that closes the cavity of the middle ear from the outside changes position.

How are the cell walls of a plant and fungus different ?

List two new traits (structural or behavioral) that each new species of rat might demonstrate as it adapts to the conditions on two of the four islands. choose only two islands that are described in the lesson. record the island latter and the major habitat feature of the island. then list two new traits each rat subspecies might demonstrate in order to survive the habitat on that island. note: new traits should be unique to that island and be in response to that island’s habitat feature. i cannot remember islands that were names in the lesson so only answer if you have done the lesson (5.13 life science 7b) choose 2 of the islands and describe a structural and a behavioral trait for a rat on each island so 4 total answers, 2 different structurals and 2 different behaviorals, one for each rat for each island

The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food