Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
27 Cards in this Set
- Front
- Back
How has urban development affected the Great Lakes?
|
toxic pollution, animals being killed, many spills that cause destruction
|
|
what is ecology?
|
the study of how organisms interact with one another.
|
|
what is an ecosystem?
|
all of the interacting parts of a biological community and it's physical environment within a given area.
|
|
what is a producer?
|
an organism capable of making their own food from water, light and air. (tree)
|
|
what is the difference between a herbivore, carnivore and omnivore?
|
herbivore: eats 90% fresh plants
carnivore: eats 90% fresh meat omnivore: eats a mixture of fresh meat and plants |
|
What is the difference between abiotic and biotic factors?
|
abiotic factors are part of the environment that was never living and biotic factors are part that is or was living.
|
|
What is biodiversity?
|
Biodiversity is the existence of a wide variety of plant and animal species in their natural environments, which is the aim of conservationists concerned about the indiscriminate destruction of rainforests and other habitats
|
|
Niche
|
everything an organism does to stay alive and reproduce
|
|
What is the difference between a food web and a food chain?
|
A food chain is a single strand of different energy transfers while a food web shows the whole ecosystem (eg. a forest)
|
|
What is a decomposer?
|
an animal that feeds on detritus. (waste from plants and animals, including dead animals)
|
|
What are the different Trophic levels?
|
primary producers, herbivores, carnivores, omnivores, decomposers
|
|
What is an ecotone?
|
An ecotone is an area between two ecosystems
|
|
What is Bioacculmulation?
|
refers to the amount of substances accumulated in a speices body, these include pesticides and other chemicals
|
|
Bioamplification
|
the increase in concentration of a substance that occurs in a food chain as consequence of: persistance (can't be broken down by environmental process), low rate of internal degradation and low rate of excretion of the substance.
|
|
Why does bioamplification occur?
|
consumers ingest toxic prey, then the concentration of the pesticide increases the higher up the food chain/ trophic levels
|
|
What is an example of bioamplification?
|
the DDT outbreak
|
|
Definition of population
|
all the members of a species living in one area.
|
|
Definition of a habitat
|
where an organism lives in it's environment.
|
|
What is a pesticide?
|
Chemicals designed and used to kill "pests". These chemicals are hard to get rid of and cycle through the ecosystems.
|
|
What are examples of pesticides?
|
insectiscides- insects
herbicides- weeds fungicides- moulds and mildew bactericides- bacteria |
|
Why do we use pesticides?
|
protects crops from insects, weeds and moulds. prevents disease eg. west nile virus and malaria. cosmetic reasons eg. lawns and golf courses
|
|
What is Photosynthesis?
|
the process carried out by plants and aglae to use the energy of sunlight to convert carbon dioxide and water into sugar and oxygen.
|
|
What is the formula for Photosynthesis?
|
carbon dioxide + water
yeilds sugar and oxygen C6H12O6 + H20 yeilds C6H12O6 + O2 |
|
What is cellular respiration?
|
most living things use oxygen to break down sugar as a source of engergy
|
|
What is the formula for cellular respiration?
|
sugar + oxygen
yeilds carbon dioxide + water C6H1202 + 02 yeilds CO2 +H20 |
|
Name an exotic species
|
flowering rush
|
|
How did flowering rush affect the ecosystem?
|
eats and kills all plants around it. takes over the environment so that nothing else can live around it.
|