Chapter 3 CLOZE

This activity is used to test your background knowledge for the “Cells, Tissues, and Organ Systems” chapter in our book. On a separate sheet of paper, please number 1-50. On that sheet of paper, write

the word you think that the author might have used in the text with the corresponding number.

The basic units of structure and function of living things are called cells. Most cells are too small

to be seen with the unaided eye. As a result, many _1 the even smaller structures __2__ make up a cell

___3___ a mystery to scientists for ___4___ of years. The structures that ___5___ up a cell are called

___6___, which means tiny organs. The 7 were not revealed until ___8___ seventeenth century,

when the first ___9___ were invented.

In 1663, while looking __10__ a thin slice of cork __11__ a compound microscope, the English

___12___ Robert Hooke observed tiny roomlike 13 . He called these structures ___14___. But the

cells that Hooke ___15___ in the slice of cork __ 16 not alive. What Hooke saw 17 actually the

outer walls of 18 plant cells.

At about the 19 time, a Dutch fabric merchant 20 amateur scientist, used a simple

21___ to examine materials such as ___22___, rainwater, and scrapings from his __23__. In each

material, Anton van Leeuwenhoek ____24___ living things. He even found __25___ living things in a

drop _26_ rainwater. Van Leeuwenhoek called these __27___ things “animalcules”. The smallest of

__28__ organisms observed by Leeuwenhoek are ___29___ known as bacteria. Bacteria are __30__-

celled organisms. These discoveries made __31__ famous all over the world.

__32__ the next two hundred years, __33__ and better microscopes were developed. Such

___34___ made it possible for _35_ German botanist Matthias Schleiden to __36__ different types of

plant ___37___. Schleiden concluded that all the __38__ parts he examined were made __39__cells.

One year later, the ___40___ zoologist Theodor Schwann made similar ____41____ using animal parts.

About twenty __42__ later, a German physician names __43__ Virchow discovered that all living __44__

come from other living cells.

_45_ work of Schleiden, Schwann, Virchow, __46__ other biologist let to the ___47___ of the

Cell Theory, which __48__ one of the cornerstones of ___49___ biology and is accepted by __50__. The

cell theory states that all living things are made of cells, cells are the basic units of structure and

functions of living things, and living cells come only from other living things.

FLIP Student Assessment on Exploring Life Science Prentice Hall (1999)

Friendliness:

1. Do you find that the graphs, pictures, and drawings help you understand what you are reading or give you an idea of what the author is asking you?

2. Do the summaries and key terms at the end of the chapter help you know what to study for? Language

3. Do you find any of the reading hard to understand? Please explain.

4. Are there any words, besides the vocabulary, that you struggle with?

5. Did you know the meanings of any of the vocabulary words before we started reading? Interest

6. Do you think Chapter 3, “Cells, Tissues, and Systems”, is an interesting subject?

7. Do you enjoy learning about science?

NEW VOCABULARY

8. Did any of the pictures or figures catch your attention? Why? Prior Knowledge

9. Please go through the major headings, below write what you know about the following areas.

A) The Cell Theory-

B) Structure and function of cells-

C) Cell Processes-

D) Cell Growth and Division