When speaking of the king of trees in Western world, oak tree undoubtedly takes the crown. The tree's main trunk grows upward and branches out toward the top. Under optimal conditions oaks can grow to a height of more than 130 feet（40 m) and live an average of 600 years.
How do these big trees absorb nutrition for it's energy source? Firstly, the leaves absorb carbon dioxide and produce sugars by means of photosynthesis. At the same time, transpiration in the leaves pulls the xylem sap upward. Oak trees also possess deep, broad root system which enable them to absorb water and minerals in the soil.
Self pollination is another character of oak trees--they produce both male and female flowers. While male flowers are hanging notably on the trees, female flowers are hidden among the leaves
antomy of oak trees
最后编辑于 ：
©著作权归作者所有,转载或内容合作请联系作者
- 文/潘晓璐 我一进店门，熙熙楼的掌柜王于贵愁眉苦脸地迎上来，“玉大人，你说我怎么就摊上这事。” “怎么了？”我有些...
- 文/花漫 我一把揭开白布。 她就那样静静地躺着，像睡着了一般。 火红的嫁衣衬着肌肤如雪。 梳的纹丝不乱的头发上，一...
- 文/苍兰香墨 我猛地睁开眼，长吁一口气：“原来是场噩梦啊……” “哼！你这毒妇竟也来了？” 一声冷哼从身侧响起，我...
推荐阅读更多精彩内容
- ［动待花开］ 201700806学习力践行记录day83 1.百数方格100占山为王,狗皮膏药 2.听鹅妈妈音频2...
