According to Google, in biology (or science), it means "to cover any funding for scientific research"
Malfunctioned?
denaturation is a permanent change, an enzyme cannot function again once it's denatured.
but enzymes are not living things , they cannot be killed.
(not sure)
They have different sizes and shapes. An example would be a tomato and a grape. Tomatoes are red, grapes are purple/green. Grapes are small, tomatoes (most of them) are large. This must be because the cells that make the tomatoes differ from the one that makes the grapes. Hope this helped/made sense :)
Your answer is going to be,
A) As embryos develop, their cells become specialized to perform different functions.