Organization
The combined portions of our planet in which all life exists.
Biosphere
Where does the energy for most of life's processes come from?
The Sun
A series of steps in which organisms transfer energy by eating or by being eaten.
Many of these make up a ____ ____.
50 points each
Food Chain
Food Web
All of the chemical substances an organism needs to sustain life and carry out life functions.
Nutrients
When two organisms attempt to occupy the same niches in the same place, _________ occurs - usually in the form of fighting or fending for resources.
Competition
A group of individuals that belong to the same species in the same area.
Population
An animal that eats only plants is an ________.
An animal that eats only meat is an ________.
Worth 50 each
Herbivore
Carnivore
Each step in a food chain or food web.
Trophic Level
Processes during which nutrients are recycled through the biosphere.
Biogeochemical Cycles
_____ refers to an organism's role in its environment.
_____ refers to where an organism physically lives.
Worth 100 each.
Niche
Habitat
Different populations living together in a defined area.
Community
_______ are organisms that obtain their energy from the sun. In food webs, we call them ________.
Worth 100 each.
Autotrophs
Producers
The total amount of living tissues within a specific trophic level.
Biomass
Water enters the atmosphere through evaporation or the process of __________, where water exits plants and enters the atmosphere.
Transpiration
_______ is when an animal eats another animal to survive.
_______ is when an animal eats a plant to survive.
Worth 150 points each
Predation
Herbivory
What is a biotic factor? Define and name two examples (200 for definition, 100 per example).
Any living part of an ecosystem with which an organism might interact.
-Plants
-Animals
The process of using chemicals to obtain energy.
Blue whales eat small marine animals called krill as the primary staple of their diet. Which species likely has the greatest overall biomass?
Krill
________ removes carbon dioxide from the atmosphere.
________ returns carbon dioxide to the atmosphere.
Name the two biological processes. 200 points for each.
Photosynthesis
Respiration
This states that no two organisms can occupy the same niche at the same time.
What is an abiotic factor? Also, give three examples. (200 for definition, 100 for each example).
Any nonliving part of an ecosystem which may affect an organism or with which it may interact.
-climate
-soil
-wind
-water
-rocks/geology
_______ refers to an organism that eats dead animals and vegetation.
_______ refers to organisms that aid in the decomposition process of other organisms.
250 each.
Detritivores
Decomposers
A diagram that shows the relative amounts of energy contained within each trophic level in a food chain or food web.
There are three kinds: name them. 200 for definition and 100 for naming each type.
Ecological Pyramid
-Numbers
-Biomass
-Energy
During this cycle, bacteria works in four ways to convert nutrients to a more usable form. What cycle is this, and what are the four ways bacteria works?
100 points for each answer
Nitrogen Cycle
1. Denitrification
2. Nitrogen fixation
3. Converts ammonia to nitrates/nitrites
4. Uses nitrogen directly
______ refers to any two animals who live and coexist closely together.
___________ refers to a situation where one organism is helped and the other is harmed.
___________ refers to when both organisms benefit from the relationship.
___________ refers to when one organism benefits and the other is neither helped nor harmed.
Which of these three best describes a barnacle living on a whale's back?
Symbiosis
Parasitism
Mutualism
Commensalism
Commensalism best describes this scenario.