Because freezing will often burst the cell walls and destroy tissue. The crystals of ice are very sharp and hard to control AFAIK. Note what happens to a banana or many types of fruit after you dethaw — it becomes all mushy and not of the same structure, fiber and cell form as before, like a bad beam up in Star Trek.
They become more large and are less able to divide and multiply.Which as an increase in pigment and a fatty substance inside the cell . (Hopes this helped)
Ionic bonds result when electrons are tranfered between atoms. Covalent bonds result when valence electrons are shared between atoms. You should be able to identify whether an ionic or covalent bond is being formed between atoms.
B Nature selection for traits the allow for increased rates of reproduction and survival over traits that don't, is correct.
A is also correct
