Xylem: cells that bring water and minerals from the roots into the leaf<span>. Phloem: cells that usually move sap, with dissolved sucrose(glucose to sucrose) produced by photosynthesis in the </span>leaf<span>, out of the </span>leaf<span>. A sheath of ground tissue made of lignin surrounding the vascular tissue. thats how leaves are made
</span>Some leaves<span> have a petiole, which attaches the </span>leaf<span> to the stem; </span>leaves<span> that </span>do<span> not have petioles are directly </span>attached to the plant<span> stem and are called sessile </span>leaves<span>. ... In an opposite </span>leaf<span> arrangement, two </span>leaves <span>connect at a node. In a whorled arrangement, three or more </span>leaves<span> connect at a node. thats how they r attach </span>
~over hunting has killed a lot of species ~we genetically modify plants and animals to our liking ~we have introduced a lot of invasive species to different places effecting local wildlife
