1. All living organisms require sources of carbon and energy
1. synthesis of biological molecules requires carbon <
1. other requirements include nitrogen, phosphorous, etc.
2. synthesis of biological molecules requires energy
2. Energy sources
1. Biological energy is obtained from ATP
1. organisms make ATP three different ways
1. burn (oxidize) organic compounds
2. burn (oxidize) inorganic compounds
3. capture sunlight (phototrophs)
3. Carbon sources
1. organisms obtain carbon from two sources
1. heterotrophs use organic compounds
2. autotrophs use inorganic compounds (like CO2)
4. Thus there are six possible combinations
1. Bacteria - all six have been found
2. Protists
1. photosynthetic autotrophs or
2. non-photosynthetic heterotrophs
3. Plants
1. mostly photosynthetic autotrophs
2. can and do respire at night
4. Animals
1. all are heterotrophs
5. Where do protists get their carbon and energy?
1. predation or scavanging
2. parasitism
3. photosynthesis
6. Where do animals get their carbon and energy?
1. all are heterotrophs
2. what varies is what they eat
1. other animals (predators)
2. scavanging or detritus
3. plants (herbivores)

1-4.  Match each of the following terms or descriptions to the correct source of energy or carbon
 
 

1.  autotrophic	A.  "burning" glucose, consuming oxygen to produce ATP
2.  heterotrophic	B.  obtaining carbon from inorganic molecules like carbon dioxide
3.  photosynthesis	C.  collecting light to produce ATP
4.  respiration	D.  obtaining carbon from organic molecules like glucose

5.  Label each of the following organisms as authotrophic, heterotrophic, photosynthesizing, respiring (use at least two labels for each).

Tulip
Paramecium (predatory protist)
Dragonfly
Portabello mushroom

6-9.  Match each of the following terms with the correct description of food.
 

6.  parasite	A.  consuming plant material without killing the plant
7.  predator	B.  consuming organic material from dead organisms
8.  scavanger	C.  consuming many smaller organisms, killing them
9.  herbivore	D.  consuming animal material without killing the animal

See also page 575 "Content review"#6
 

Answers