The external ear structure is called the Pinna.

The Pinna helps to channel sound waves into the ear.

Many animals have the ability to move their pinna towards the direction of sound.

I have attached an image of a dog's ear to show you the external structure called the Pinna.

I hope this helps! I'm happy to answer any other questions you might have :)

[Image sourced from: https://www.msdvetmanual.com/dog-owners/ear-disorders-of-dogs/ear-structure-and-function-in-dogs]

7 0

3 years ago

Researchers performing a well-designed experiment should base their conclusions on

Virty [35]

Answer:

Explanation:

6 0

3 years ago

Nebula - protostar - main sequence star. The hydrogen gas in the nebula is pulled together by gravity and it begins to spin and

andrezito [222]

Answer:

The mass of a star determines its life cycle, that is, more the mass, shorter will be its life cycle. The mass of the star is determined by the concentration of matter, which is found within its nebula. In the nebula, with time, the hydrogen gas comes in close proximity with each other due to gravity and starts to spin.

With the brisk spinning, the gas heats up and turns into a protostar. The temperature now reaches 15,000,000 degrees and within the core of the cloud, the phenomenon of nuclear fusion takes place. The cloud now contracts a little, starts to glow brightly, and turns stable. The cloud now becomes a prime sequence star, and will stay in this phase for millions of years, the Sun of our galaxy is in this stage at the moment.

8 0

3 years ago

Stella thinks that if people are exposed ultraviolet light then they are more likely get skin cancer. Stella designs an experime

Scrat [10]

Sample b is the control group because it’s the group not being tested and being kept the same.

6 0

2 years ago