Matter and Energy
Which one will have greatest biomass ?
Raccoon, egrets, fish, marsh grass
Marsh grass
How do animals get nitrogen to build protein and DNA ?
Through their diet
Ant lives on a plant and defends plant from other insects. What kind of relationship is it?
Mutualistic
What are the four MAIN processes involved in water cycle?
Evaporation, condensation, precipitation, transpiration
What is cellulose ?
A polymer made of glucose
Wolves eat rabbits and rabbits eat grass and grass makes its own food energy . What will happen if lots of wolves are killed ?
There will be more rabbits
Animal respiration (requires oxygen), volcanic eruption ( carbon mono oxide plus oxygen)and fossil fuel combustion (oxidation of hydrocarbons). Aside carbon cycle, which other cycle are they affecting?
Oxygen cycle
What is the primary role of decomposers
They cycle matter by returning carbon and other matter to the ecosystem.
What is crop rotation ?
Planting new crops every 2-3 years to retain soil nutrients.
What are the elements found in carbohydrates and nucleic acid?
CHO
CHONP
How do producers obtain energy?
through photosynthesis, by making sugar using sunlight
in the carbon cycle, atmospheric carbon dioxide is converted into organic material by which process ?
Photosynthesis
In an ecological succession, which one appears first ? Lichens or moss ?
Lichens, they do not need moisture to grow
What group is must for an ecosystem
Producers
Cholesterol belongs to which category of biomolecule ?
Lipid
Removal of which of the ecosystem groups will cause an immediate decrease in amount of energy flowing in ecosystem?
Producers
What is the role of Nitrogen fixing bacteria ?
Convert ammonia from animal feces to forms that plants can use (nitrates)
What causes a growth curve to flatten after some time ?
Death rate = birth rate
Limiting factors
Highest percentage in atmosphere
Nitrogen
How is a specific enzyme able to catalyze a specific reaction ?
An enzyme binds to a specific substrate for the reaction catalyzed.
Grass -> Mouse -> Snake -> Hawks
There are less hawks in this ecosystem than mice. Why ?
Energy transfers from left to right and only 10% goes to the next level. Thus the level on top of food chain have very few organisms.
What is the most immediate effect on carbon cycle if plants are removed from ecosystem ?
Accumulation of carbon dioxide in atmosphere / less usage of atmospheric carbon dioxide
If there are 7 species in a park A and 700 people in park B , which is more diverse
Park A
Do energy amount remains same through ecosystem
No it is lost via heat loss
What is the energy transfer molecule made by plants and animals during cellular respiration ?
ATP