Have you ever looked closely at a plant and wondered what it would look like to zoom in and see the intricate details beneath the surface? Well I got to do that in my Biology class! Plants have incredibly complex structures that help them perform many important functions. The roots of the plant hold it in place and absorb nutrients and water from the soil. The stem or trunk of a plant contains a vascular system where water and minerals are transported to the roots, along with sugars from the leaves. The leaves absorb sunlight and convert CO2 and water into sugar and oxygen through a process called photosynthesis thus removing CO2 from the air and replacing it with oxygen. Incredibly plants feed themselves with the sugars they produce from photosynthesis!
Millions of years ago the Earth was covered by gymnosperms, or what we now call evergreens. They reproduce with "naked" seeds usually found in cones or on leaves. Angiosperms which represent all the flowering and fruiting plants evolved later. Although Earth was once dominated by gymnosperms, angiosperms are the most abundant form of plant life today. Angiosperms are seasonal and have seeds protected inside of ovaries. In fact many of the fruits that we eat, like apples, are the ovaries of the tree they grew on!