Explain why you have so many responses to one stimulus

Some plants rely on the wind to reproduce an example is it’s important for plants to use the forces of nature to reproduce because 1. 1a white tuft of dandelion seeds 2a spiked burrs surrounding seeds 3a hard shell on a walnut? 2. 1b require pollination to reproduce 2b reproduce only asexually 3b cannot move about freely?

How does natural selection change thephenotypes within a population over time?

What is the next step in muscle contraction after the actin changes shape? (apex)