1. Explain the contributions of Robert Hooke and how he helped pave the way for futur knowledge. 2. Explain the contributions of Matthias Schleiden and Theodore Schwann.

Robert Hooke main contribution is the discovery of cell.

Explanation:

Robert Hooke (1635-1703) is an English physicist. he was the first man who discovered cell by analyzing the cork. This discovery of cell leads the way for future knowledge about the structure of all living organisms. The contributions of Matthias Schleiden was that he was the first man who analyze the structure of plant cell while on the other hand, Theodore Schwann analyze the animal cell and proposed cell theory from that.

i believe the correct answer is d

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.