Whether people eat plants or eat animals that feed on plants, plant life is vital as a food source. Plants play many other essential roles. They are the major producers of oxygen on this planet. All plant life, from the tallest redwood tree to the smallest plankton works to produce oxygen. The largest living things on earth are the giant sequoia trees of California while other plants living on the forest floor are so tiny they can barely be seen.
Plants are also the oldest living things.
One bristlecone pine tree in California started growing 4,000 to 5,000 years ago. These two groups are further subdivided based on characteristics common to the plants found within the group. This course will focus primarily on vascular plants but this lesson will end with an exploration of examples of plants found in each of the major plant groups. Activity Part 1 Go out to the greenhouse during one of the following times to get your botany logbook started and to germinate corn and bean seeds . This will take about 15 minutes.