The biological act of receiving sound is called HEARING.Hearing involves the transmission of sound waves through the ear canal until they reach the ear drum which pass the sound to the inner ear through the middle ear. In the inner ear, the sound waves are converted into electrical impulse which is sent to the brain for interpretation via auditory nerve.
A blastula is an embryo at the first stages of development when it is just cells so the answer is:
<span>d. a hollow ball of cells in an embryo
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Answer:
The correct answers would be natural selection and high genetic variation in the species.
Natural selection refers to the natural phenomenon by which organisms which are better adapted or have survival traits tend to survive and reproduce more in the environment.
It leads to an increase in the frequency of the trait in a population.
Genetic variation refers to the sum total of all the genetic characteristics present in a population. Higher genetic diversity higher are the chances of a population to survive.
Similarly, different sizes of the beaks are the result of high genetic diversity out of which large size beak was favored by natural selection.
Ultimately, the large beak size trait spreads through the population.
Answer:
B. Some people find it unattractive.
Explanation:
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