Life On Earth B3 Flashcards
When does energy transfer between organisms?
It occurs once they have eaten and when they have died.
Where does most of the energy end up?
Most of it is lost as heat, waste products and also uneaten parts.
What happens to nitrogen in the nitrogen cycle?
Nitrogen is recycled.
How is environmental change registered?
It is registered using non-living indicators and living indicators.
What are species?
Species is a group of organisms that can breed together to produce fertile offspring.
What does the carbon cycle do?
It recycles carbon through the environmental.
What happens to the other specie, if one specie becomes extinct?
The changes would have an impact on the other one because there food source has gone. Therefore the specie would start having a decrease in numbers as there is no more food left. It is like the domino effect. If one animal falls, the others will follow slowly behind.
What happens to variation that is genetic?
It is passed to offspring.
When can variation arise?
Variation can arise from accidental changes in genes (mutations)
All living things evolved from….
Simple living things.
Where do natural selection results come from?
Genetic variation and competition between organisms for reproduction and survival.
Where does evidence for evolution come from?
Fossil record and analysis of DNA.
Organisms are classified into groups…
Physical features and DNA
What does biodiversity refer to?
It refers to the virility amazing the living things.
What does sustainability mean?
Sustainability is the measure if a product will still be in use in the future.
