The pit that marks the location of the umbilical cord after birth is known as the navel or belly button. All animals that grow placenta during fetal development will have a navel or belly button. The scientific name of the structure is the umbillicus. It can be a depression in some individuals or raised in others.
Answer:
C. Atoms share one or more electrons.
Explanation:
Covalent bonds involve the sharing of electrons between atoms; ionic bonds involve the electrical attraction between atoms.
Answer:
d) Protein
Chromatin fibres are wrapped around special proteins called Histones
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Answer:
I dont know what the following are but here:
When a substance changes its state of matter, its atom/molecules eirther slow down or speed up.
