Answer:
Kerb cycle
<u>Explanation</u>:
The result from mitochondria is ATP, that acts as a currency of the energy in the cell. In the cytoplasm of mitochondria kerb cycle occurs. In this process it has several other process, once it uses acetate and water to give NADH from NAD+ and gives carbon dioxide as waste. The NADH formed is fed by oxidative phosphorylation or electron transport. The outcome of these processes is oxidation of nutrients to give chemical energy in ATP form.
2nd choice is the correct one
Activation of muscle contraction could be a speedy event that's initiated by electrical activity within the surface membrane and transversal (T) tubules. This can be followed by unharness of metal<span> from the inner membrane system, the sarcoplasmic reticulum.
</span>Nervous stimulation causes a depolarization<span> of the muscle membrane (sarcolemma) </span>that<span> triggers </span>the discharge<span> of </span>calcium<span> ions from the sarcoplasmic reticulum.</span>
<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.
I think I’ll go with C. long dry cold winters
