章节大纲

  • A serving of prepared seaweed on a square plate, garnished with sesame seeds.

    Would you eat seaweed ?
    ::你会吃海藻吗?

    Seaweed is commonly eaten in many parts of the world. It's good for you, too; it's high in nutrients and low in calories . You have probably eaten processed seaweed and not even known it, since it's used as a thickener in foods like ice cream. Seaweed and other are also food for many, many in the .
    ::海藻在世界上很多地方通常被吃。对你也有好处,营养素高,热量低。你可能吃过加工过的海草,甚至不知道,因为海草是冰淇淋等食物中较厚的食物。海藻和其他也是许多食物,其中很多。

    Importance of Protists
    ::原生者的重要性

    Humans could not live on Earth if it were not for protists. Why? Plant-like protists produce almost one-half of the oxygen on the planet through . Other protists decompose and recycle nutrients that humans need to live. All protists make up a huge part of the .
    ::人类不能在地球上生存,如果它不是先质者。为什么?植物类先质者通过它生产了地球上将近一半的氧气。其他先质者腐蚀和回收人类需要生存的养分。所有先质者都占其中的一大部分。

    Humans use protists for many other reasons:
    ::人类使用先质出于许多其他原因:

    • Many protists are also commonly used in medical research. For example, medicines made from protists are used in treatment of high , digestion problems, ulcers, and arthritis .
      ::医学研究中也经常使用许多先质药物,例如,先质药物用于治疗高血压、消化问题、溃疡和关节炎。
    • Other protists are used in scientific studies. For example, (including D. discoideum , a soil-living protist) are used to analyze the chemical signals in .
      ::其他原生者用于科学研究。例如,(包括D. Dicoideum, 土壤生物原生者)用来分析化学信号。
    • Protists are also valuable in industry. Look on the back of a milk carton. You will most likely see carrageenan , which is extracted from red . This is used to make puddings and ice cream solid ( Figure ). Chemicals from other kinds of algae are used to produce many kinds of plastics.
      ::蛋白质在工业中也很宝贵。 看看牛奶盒的背面。 您最有可能看到从红色中提取的carrageenan。 这是用来制造布丁和冰淇淋固体的( 图表 ) 。 来自其他种类藻类的化学品被用于生产多种塑料。

    Child holding an ice cream cone with pink and white ice cream.

    Ice cream is an example of a food made with ingredients derived from algae.
    ::冰淇淋是用藻类成份制成的食品的例子。

    Summary
    ::摘要

    • Protists make up a huge part of the food chain and supply much of the oxygen we breathe.
      ::原生者构成食物链的一大部分 供应我们呼吸的氧气
    • Protists are used in medicine and as food additives.
      ::原生者用于医药和食品添加剂。

    Explore More
    ::探索更多

    Use the resource below to answer the following questions.
    ::使用以下资源回答下列问题。

    • Algae to Fuels at (2:34)
      ::升到燃料(2:34)
    1. What would the potential benefit be to having algae ponds next to power plants?
      ::发电厂旁边有藻类池的潜在好处是什么?
    2. Where in the algae cell is oil stored?
      ::藻类细胞中的石油储存在哪里?
    3. How is oil extracted from algae?
      ::从藻类中提取的石油如何?
    4. What does "carbon neutral power source" mean?
      ::“碳中性动力源”是什么意思?

    Review
    ::回顾

    1. What are two ways protists are important to people?
      ::有两种方法对人很重要吗?
    2. How are protists important to the ecosystem?
      ::原生者对生态系统如何重要?
    3. What is carrageenan?
      ::什么是卡拉吉恩人?