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Reading comprehension -TOEFL- Lesson 122 (Đọc hiểu -TOEFL- Lesson 122)

Reading and answers the question:

   Algae is a primitive form of life, a single-celled or simple multiple-celled
organism that is able to conduct the process of photosynthesis. It
is generally found in water but can also be found elsewhere, growing
on such surfaces as rocks or trees. The various types of algae are
5 classified according to pigment.

Blue-green algae, or Cyanophyta, can grow at very high temperatures
and under high-intensity light. This type of algae is the oldest form
of life with photosynthetic capabilities. Fossilized remains of
10 blue-green algae more than 3.4 billion years old have been found in
parts of Africa.

Green algae, or Chlorophyta, is generally found in fresh water. It
reproduces on the surfaces of enclosed bodies of water such as ponds
15 or lakes and has the appearance of a fuzzy green coating on the surface of
the water.

Brown algae, or Phaeophyta, grows in shallow, temperate water. This
type of algae is the largest in size and is most recognizable
20 as a type of seaweed. Its long stalks can be enmeshed on the ocean
floor, or it can float freely on the ocean's surface.

Red algae, or Rhodophyta, is a small, delicate organism found in the
deep waters of the subtropics. This type of algae has an essential role
25 in the formation of coral reefs: it secretes lime from the seawater to
foster the formation of limestone deposits.
1. What is the author's main purpose?




2. Which of the following is NOT true about algae?




3. The word "pigment" at the end of the first paragraph means




4. Algae remnants found in Africa are




5. Green algae is generally found




6. Brown algae would most likely be found




7. According to the passage, red algae is




8. It can be inferred from the passage that limestone deposits serve as the basis of





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