You are given a sentence and your task is to generate another sentence that supports the given input.

Q: Amphibians and most living reptiles have a three-chambered heart, which has usually been regarded as inferior to the four-chambered heart of living mammals and birds.

A: There are three chambers in a reptiles heart.
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Q: The light travel time for the most distant visible galaxies is several billion years, comparable to the age of the universe, so by studying distant galaxies we are also looking back in time.

A: Due to the time it takes for light to reach us, galaxies at the edge of the universe are distant in terms of space and time.
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Q: Terrestrial biomes are classified by climatic factors and types of primary producers.

A:
Terrestrial biomes are classified by climatic factors and types of primary producers.
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