Extinction Flashcards
(30 cards)
Means that the last identified individual of species has been extinguished or no longer existing permanently.
Extinction
A catastrophic event has decimated life on Earth.
Mass extinction
Environmental factors that occurred in the past still exist today.
Modern Day extinction
The first mass extinction happened 440 million years ago
Ordovician extinction
During this period, land plants developed deep roots that release nutrients in the ocean that cause algal bloom in the ocean to flourish
Devonian extinction
The deadliest mass extinction that occurred 252 million years ago. 96% of life was lost in this extinction
Permian extinction
During this period 80% of life was lost including Dinosaurs ancestor
Triassic extinction
Is the variation of living forms within an ecosystem
Biodiversity
Because of an asteroid hit, 60% of life on Earth was lost including dinosaurs
Cretaceous extinction
Occurs when a natural habitat is no longer able to support its native species
Habitat loss
It is where a habitat fragmented or divided into smaller pieces
Habitat fragmentation
Is the new species introduced to or added in the environment either deliberately or accidentally by human activities
Introduced species
Taking up too many resources from the environment
Overexploitation
Is the introduction of harmful materials into the environment, and sometimes nutrients to other organisms
Pollution
A resource that can be used repeatedly and does not run out because it is naturally replaced
Renewable resources
A natural resource that cannot be readily replaced by natural means at a pace quick enough to keep up with consumption
Non-renewable resources
The process by which plants use water, sunlight, and carbon dioxide to create oxygen and energy in the form of sugar
Photosynthesis
An organelle within the cells of plants and certain algae that is the site of photosynthesis
Chloroplast
A green pigment responsible for harvesting the sun energy
Chlorophyll
Membrane-bound compartments inside chloroplasts. They are the site of light dependent reactions of photosynthesis
Thylakoid
The fluid filling up the inner space of the chloroplasts which encircle the grana and the thylakoids
Stroma
What are the two stages of Photosynthesis?
Light independent reaction/ Calvin Cycle and Light dependent
Internal structure of the leaf where light dependent reaction happens
Thylakoid
Internal structure where light independent reaction happens
Stroma