* Trees may help reduce the effects of global warming by:
* What two main substances do trees need to live?
* The amount of carbon dioxide a tree may remove from the atmosphere to gain one pound is:
* What is one of the byproducts of photosynthesis?
* The water vapor given off by a tree becomes a critical part of Earth's ______________.
* What element is used from the absorbed water to make the chemical energy for a tree?
* Trees are sometimes called .....?
* Approximately how much of the original forests have disappeared?
* The oldest living organism on Earth happens to be a rugged tree living in North America. This tree is the?
* What is the science of dating through tree-ring growth called?
* I have a stout stem and grow 2 to 5 feet high. I have broad flower clusters. My flowers are red to pink, lilac, and cream-white in color. All my parts contain a milky juice. I am mostly found in old fields, meadows, marshes, and roadsides. Who am I?
* I am a smooth vine that climbs by tendrils at the tips of my leaves. I like cultivated fields and borders of thickets. There are 35 species of me. I have pea-like flowers and their colors go from purple to blue to white. Who am I?
* I am also called the Yellow Daisy. I am the best known Coneflower. I have large, golden flowerheads and a dark purple center. I grow 1 to 3 feet high. Who am I?
* I am a familiar European immigrant. I form large colonies in fields and along roadsides. I grow 2 to 5 feet high. I am topped by a large number of flower buds opening daily to become a deep orange flower. Who am I?
* My other names are Bugbanes, Cohosh, and Black Snakeroot. I am actually an herb. I grow 4 to 6 feet high. I have tiny, white, feathery blooms which branch in spire-like clusters. I have an unpleasant stale oder. Who am I?
* Which division is moss in?
* How many kinds of Spermatophytes are there?
* Where are the seeds of a coniferous plant located?
* Acer rubrum is the genus and species of what tree?
* Believe it or not, the development of seeds was a major step in the evolution of plants. First to develop were 'naked' seeds (not surrounded by fruit), which can be found among the conifers and other plants of what taxonomic division?