The three last ice ages were in the periods between 450-420 mya, 360-260 mya, and 34 mya to present.
Explanation:
The ice caps on the poles, or at least one of them, form when there is a global cooling off. The temperatures drop across the planet, and that results in the poles and the surrounding areas to start freezing. As the ice spread, ice caps are formed. The ice caps can be limited only in the Arctic and Antarctic circle, but they can also move much further into the lower latitudes, all depending on the severity of the climate conditions.
- In the last 540 million years, the Earth has experienced three periods of global cooling, or ice age.
- The first of these periods was the Andean-Saharan ice age, lasting between 450 and 420 mya.
- The second has been the Karoo ice age, lasting staggering 100 million years, from 360 to 260 mya.
- The most recent is the Late Cenozoic ice age, starting from 34 mya and still going on, thus we are living in an ice age at the moment, just that we are not in a period of glaciation.
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Answer:
Explanation:
ells need both chloroplasts and mitochondria to undergo both photosynthesis AND cell respiration. After photosynthesis, which chloroplasts are needed for, which yields oxygen and glucose, plants need to break down the glucose and they use cell respiration to do this, which happens in the mitochondria.
In Galapagos Charles Darwin Discovered a large amount of birds and reptiles that had developed a sense of isolation from the main land.
Explanation: