LifeScience sec8
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| this becan whn the eath originated 4.6 billion years ago,and continued until about 540 million years ago. | Precambrian time
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| the first true cells were called | prokaryotes
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| prokaryotes are cells that pack | a nucleus
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| early prokaryotic cells were | anaerob
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| prokaryotic organisms were called | cyanobacteria
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| cyanobacteria are | pjotosynthetic organisms
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| as cyanobacteria carried out photosynthis they released | oxygen gas into oceans
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| the upper atmosphere is called the | ozone
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| uv radiation can | damage DNA
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
OMG_Elmo
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