Answer:
C,D,A,B
Explanation:
Option C - Shows the observation made
Option D - This is a question that asks what could be the cause of the observation made
Option A - This is an information on the question asked
Option b - This is a procedure to investigate the observation made
Cytoplasm should be present inside the cell.
As a result of its involvement in a reaction, an enzyme is unchanged.
Enzymes are catalysts that speed up chemical reactions that occur within the biological systems (they increase the reaction rate by lowering its activation energy). Enzymes react with substrate that binds to them (key-lock mechanism) and convert the substrate into the product. Most of enzymes are proteins by their structure but a few are catalytic RNA molecules-ribosymes.
Enzyme activity can be affected by other molecules (activators and repressors), pH, temperature etc.
I think it must be the way the bones are structured. For example, they must match the same types of components that certain reptile may compose of. But you never know