Describe the two major types of smooth muscle

How many variables are altered in a good experiment? a.1 b.0 c.2 d.3

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?

What is a group of organisms that are closely related and share similar characteristics