Step 2 should be sensory neurons send electrical signals to the brain
Step 3 brain learns information about the environment
Step 4 brain sends electrical signals to the muscles
I believe, I mean Billy believes in gradualism~
Explanation:
another word for life cycle
<span>d. All of the above
These behaviors;
Spreading wings
Flattening feathers
panting
are all evolutionary process to maintain body temperature. Birds are warm-blooded animals. Also known as </span><span>homeotherms, which is defined as having the constant body temperature. This is a vital function for the survival of the specie.
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<span>c. are hollow
</span>
The bones of most birds are hollow in order for the weight of the birds to be light for them to fly.
The answer is d) organic chemistry
