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]
option a is good answer for me
Answer:
Parasitism: one species is benefitted and the other is harmed. So it is a negative interaction.
Commensalism: One species is benefitted while the other is neither harmed nor benefitted.
Mutualism: Both the species are benefitted by the interaction.
Explanation:
Parasitism is negative interaction
Commensalism and mutualism are positive interactions
(30%) gorilla babies die within the first few months of their lives because of inherent weakness of the infant or disease.
What is inherited disease?
Genetic factors play a role in almost all health conditions and traits, but there are some conditions in which genetic alterations play a role in almost all of the causes that cause the condition.
Genes are passed from parent to child, so are DNA changes within the gene. DNA changes can also occur spontaneously, first appearing in children of unaffected parents. This is called a new mutation, and the word mutation means change.
Therefore, (30%) gorilla babies die within the first few months of their lives because of inherent weakness of the infant or disease.
To know more about inherited disease, visit:
brainly.com/question/14137800\
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