Seed cracker birds have either large beaks or small beaks. they do not have medium-sized beaks because medium-sized beaks do not allow for adequate cracking of seeds.
a. disruptive selection
b. directional selection
c. stabilizing selection
*WILL MARK AS BRAINLIEST*

This is what i found on google“ the monomers combine with each other via covalent bonds to form larger molecules known as polymers. in doing so, monomers release water molecules as byproducts. this type of reaction is known as dehydration synthesis, which means “to put together while losing water. in the process, a water molecule is formed.” i hope this you

It allows water to resist freezing and thawing cycle.

Very minute and important evidence needs to be collected in order together detail and figure out what had happened