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;
18 Cards in this Set
- Front
- Back
Parts of Earth
|
Core: Liquid
Mantle: Semi-solid Crust: Solid |
|
Chemicals- Gases-Early atmosphere
|
CO2, Nitrogen, Hydrogen, Methane, Sulfur, Ammonia, H2O.
|
|
How long ago 1st cells evolved
|
2.75 billion years
|
|
1st cells
|
-Resembled prokaryotic cells.
-Lacked membrane bound organelles. -Unicellular, tiny. -Fermentation process (anaerobic respiration) |
|
Heterotrophs
|
-Feeding an organic molecule.
-1st heterotroph are around 3 billion years ago. -chemisynthesis. |
|
Eukaryotic cells
|
-Around 2.1 billion years ago.
-Membrane bound organelles. -Complex cells. |
|
Photosynthesis
|
-Around 2 billion years ago.
-Production of 02 -> produce aerobic cell resp (produces ATP) |
|
What type of environment are ancient bacteria found?
|
Heat, extreme PH, pressure, salinity.
|
|
Which kingdom contains both unicellular and multicellular organisms?
|
Protista
|
|
What type of plants were the first to occupy land?
|
Bryophytes
|
|
What is most beneficial role of bacteria?
|
Medicine
|
|
As heterotrophs how do fungi differ from animals?
|
Fungi: digest / ingest.
Animals: Ingest / digest |
|
Species
|
Latin "Kind".
similar structure. interbred naturally and produces fertile offspring. |
|
Species Today
|
around 10 million (ID less than 2 million)
around 70% species found in tropics past. around 2/3 of species were insects. |
|
Natural selection
|
1. More offspring produced than he environment can support.
2. Individuals within that species must compete for limited resources. 3. Variation among individuals in a species. 4. Those with the most favorable characteristics allowing them to obtain the limited resources survived. 5. Those that survived reproduced and passed on the genes for the favorable characteristics to their offspring. 6.Genetic frequency of genes changed overtime in the species ultimately creating a new species. |
|
Fossil
|
Any remnant or impression of an organism that once lived.
|
|
Unity
|
common among all living organisms.
|
|
speciation
|
evolutionary process by which biological species arise.
|