could the finches that evolved
bigger beaks in this study evolve
smaller beaks some day?

Yes

Explanation:

Natural selection allows for the survival of the fittest. According to natural selection, those organisms are able to live and reproduce which have better traits to adapt to an environment. Hence, in the future, if conditions become favourable for small finches then through evolution, small finches will be seen widely again. If the food sources gain become favourable for small finches, then the birds with small finches will live and reproduce more

b..

is the correct one

explanation:

covalent bonds form as valence electrons are shared between two atoms. lewis structures and structural formulas are common ways of showing the covalent bonding in organic molecules. formal charge describes the changes in the number of valence electrons as an atom becomes bonded into a molecule.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e