Answer:

Explanation:
Proteins are found inside the cell. There are proteins in the cell membrane and cytoskeleton, they act as enzymes inside the cell, and they are created inside the cell during protein synthesis at the ribosome.
Since proteins are part of the cell and are made inside the cell, the <u>proteins</u> must be smaller.
ok so i dont know much about this but but im going to try my best.
so i did a bit of research about what all those birds have in common like you asked for and so they birds really dont have that much in common, so i went on a PREZI and i did some more reasearch i took some pictures to maybe help you.
im not sure if this helped if i didnt do it correctly just lemme know and ill do more research
ok so i added more research to this, look at the pictures, it is the EXACT answer to your question, if you need more research lemme know fam
a.shed their skin..
Explanation:
Exoskeleton
A true exoskeleton, like that found in arthropods, must be shed (moulted) when it is outgrown. ... The new exoskeleton is still capable of growing to some degree, however. Animals of the order arthropoda, like lizards, amphibians, and many other animals that shed their skin, are indeterminate growers
Louis Pasteur discovered heating as a process of removing the number of bacteria present in a liquid best known as pasteurization. He used S-necked flasks in his experiment in order to permit<span> the air to pass into the flask, such that it maintains any airborne microorganism that contaminate the broth at the same time.</span>