1. 1) By which process is the potential energy of
organic molecules transferred to a form of
energy that is usable by the cells?
1) digestion
2 ) hydrolysis
3) photosynthesis
4) respiration
Photosynthesis takes in light energy and makes sugar (glucose)
Digestion – breaks down food so that the cells can absorb the nutrients

2. Fermentation – is anaerobic respiration: no oxygen involved
Transpiration, evaporation, precipitation and condensation all refer to WATER
Photosynthesis produces oxygen
Respiration oxygen is taken in

3. Which of the following is a producer-consumer
relationship?
foxes eat rabbits
people eat mushrooms
frogs eat flies
rabbits eat grass
Mushrooms are decomposers – not producers
Producers are autotrophs that make their own food energy
Consumers eat producers (and sometimes other consumers)

4. Community is comprised of any kind of living things
Water, temperature and climate are not LIVING
BIO=LIFE
4) The biotic component of an ecosystem is
a community.
b. water.
b. the temperature.
c. the climate.

5. Bromothymol Blue changes to yellow
When exposed to carbon dioxide
Flask 1 = Blue – photosynthesizing plant takes in carbon dioxide
Flask 2 = Yellow – fish exhale carbon dioxide into the water
Flask 3 = Blue – fish exhale carbon dioxide into the water and the plants take the carbon dioxide in
Flask 4 = blue – nothing is happening –This is the control
Key piece of information

6. Decomposers are worms, mushrooms – that break down dead organisms – they are found in the ground – the nutrients from the dead organisms id returned to the soil
Nitrogen makes up our DNA and muscles

7. A really important element for all life is NITROGEN!

8. FOLLOW THE ARROWS!
Tadpole population decreases – what they eat will increase –
They eat algae – the arrow direction is from algae to tadpoles

9. FOLLOW THE ARROWS
Nitrates go to plants
Nitrogen is present in proteins and DNA (nitrogenous bases)

10. Photosynthesis relates to carbon as a gas – carbon dioxide – used by plants in the dark reactions
CARBOhydrates are made of carbon
Decay and burning stuff releases carbon dioxide
All organic things are made of carbon

11. For secondary consumers there are 100kcal available – at each level some of the energy is lost to life processes of the consumers

12. Biomass is energy from living organisms
Only 1 describes this decrease in available energy
You are looking for an answer that describes decrease in biomass (not 2 or 3)

13. Absorbed means –taking in (water) – infiltration is movement INTO (roots)

14. Follow the arrows – all arrows lead to the decomposer!
MUSHROOM

15. Producers = plants
Primary – grasshopper and mouse
Secondary consumer – scorpion, snake
NO DECOMPOSER

16. Carbon cycle
Producers incorporate chemicals from the nonliving environment into organic compounds.
Consumers feed on the producers, incorporating some of the chemicals into their own bodies and releasing some back to the environment in waste products.
As organisms die, decomposers break them down, further supplying the soil, water, and air with chemicals in inorganic form. The producers gain a renewed supply of raw materials for building organic matter, and the cycles continue.

17. At point Y – carbon is a gas (it’s in the atmosphere) as carbon dioxide
So the answer is D
At point X – it is a CARBOHYDRATE (solid)

18. Trees take in gases (carbon dioxide) during photosynthesis
The answer is B