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Alex
3 years ago
8

The Ursidae family of animals includes the giant panda, the brown bear, the polar bear, and the spectacled bear. Which of the fo

llowing characteristics best helps classify these bears into genus and species levels?
A. Eating habits
B. DNA sequences
C. Method of reproduction
D. Location of natural habitat
Biology
1 answer:
snow_tiger [21]3 years ago
7 0
B DNA sequence helps to identify characteristic of ancestors
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Put these statements in correct order to understand how hearing works. - Ions enter hair cells - Stapes moves - auditory cortex
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Answer: From the question,the correct order of how hearing works is listed below:

--> sound wave is generated from hitting a key on a piano,

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Explanation:

In mammal, two ears are present on each side of the head. It is know as the organ for hearing and balance. The ear is divided into three regions:

--> OUTER EAR: This consists of pinna, ear canal, and eardrum( tympanic membrane)

--> MIDDLE EAR: This consists of the ear ossicles ( malleus, incus and stapes).

--> INNER EAR: This consists of Cochlea (organ of hearing) and semicircular canals (for balance).

To explain further on how we hear sounds, the vibrations of sounds produced from an external source move from the outer ear to the middle and then to the inner ear where the cochlea, the organ for hearing is located.

As sound wave is generated from hitting a key on a piano, the pinna collects the sound waves and directs them into the ear canal. Sound waves impinge on the tympanic membrane and makes it vibrate. This causes the malleus, incus and stapes (in this order) to move to-and -fro at the middle ear region.

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2 years ago
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