Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
7 Cards in this Set
- Front
- Back
|
What do diatoms use Si for? |
To make frustules (cell wall) |
|
|
Are diatoms multicellular, or unicellular? |
Unicellular |
|
|
How many genera of diatom are there? |
More than 200 genera |
|
|
How many extant species of diatom are there? |
More than 100,000 extant species |
|
|
What percentage of total organic primary production of organic material do diatoms contribute? |
Estimated to contribute up to 45 % |
|
|
What is the frustule composed of (apart from Silicon) |
Two valves called thecae |
|
|
What environment is most desirable for diatoms? |
Upwelling as they provide nutrients and prevent the diatoms sinking |
