THE WACKY HISTORY OF CELL THEORY

FIRST. Watch the video, listen carefully and try to explain why the following words appears:

Ipad
Newton
Teeth
Cork
Hamburg
Twitter

SECOND. Watch the video a second time and answer these questions

1.       How many parts are there to the cell theory?

2.       Write down the three parts:

1

2

3

3.       When and where did all start?

4.       Why was Anton van Leeuwenhoek important?

5.       Whom can we thank for the term “cell”?

6.       Why did he choose this term?

7.       When and where did all continue?

8.       Which two scientists proposed the Cell theory? (complete the sentences with their main ideas)

The botanist………………

Every single plant were all ……………………………   ….    ….  ……..

And the zoologist………

All animals were ……………………………   ….    …..

9.       Which scientist proposed that cells came from preexisting cells, the last part of the cell theory?

10.   What piece of advice does the girl of the video give us?

WRITE DOWN 4 WORDS YOU HAVE LEARNED FROM THIS VIEDO:

Difference between mitosis and meiosis

MITOSIS

AFTER WATCHIN THE VIDEOS              Identify the phases of mitosis

The daughter chromosomes arrive at the poles and the spindle fibers that have pulled them apart disappear

chromatin (replicated DNA and associated proteins) condenses into chromosomes.

Microtubules then reorganize into a new cytoskeleton for the return to interphase.

 Microtubules of the cytoskeleton disassemble. And the building blocks of these microtubules are used to grow the mitotic spindle from the region of the centrosomes.

the nuclear envelope breaks down so there is no longer a recognizable nucleus.
the nucleolus fades

Tension applied by the spindle fibers aligns all chromosomes in one plane at the center of the cell.

Spindle fibers shorten,and the chromatids (daughter chromosomes) are pulled apart and begin moving to the cell poles.

a contractile ring cleaves the cell into two daughter cells.

Each replicated chromosome comprises two chromatids, both with the same genetic information

GCSE Science Revision – Cells