I. carbon- oxygen cycle
1. what 4 organic compounds is carbon found in?
2. carbon dioxide comprises approximately what percent of tropospheric gases?
3. how is the relative amount (%) of co2 significant in contributing to the earth’s “natural
thermostat”?
4. identify the two processes which have the greatest influence on tropospheric
concentrations of co2 on a monthly or yearly basis.
5. name the two largest sinks (storage areas) for carbon.
6. discuss how oceans play a major role in regulating co2 levels in the trophosphere
7. describe the two major anthropogenic interventions in the carbon cycle

Where can a dna be found in a prokaryotic cell

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.

Refer to this portion of a dichotomous key for fish identification to answer the question. 1. (a) has a single dorsal fin ® 5 (b) has a double dorsal fin ® 2 2. (a) one fin is spiny, the other is smooth ® 3 (b) one fin is not spiny or smooth ® 4 5. (a) has small fin on back near tail ® 6 (b) has no fin on back near tail ® 7 6. (a) has barbs near the mouth ® catfish (b) does not have barbs near the mouth ® 10 7. (a) tail is asymmetrical ® 8 (b) tail is symmetrical ® 9 10. (a) scales are small ® trout (b) scales are large ® whitefish what is the next step to complete to identify a fish that has a single dorsal fin, no fin on the back near the tail, and no barbs near the mouth? step 2 step 5 step 7 step 10