Combine the given two facts to write a concluding fact. Note that there should be some parts of the first and second facts that are not mentioned in this conclusion fact. Your combined fact should be the result of a chain between the two facts. Chains form when two facts connect together to produce a concluding fact. An example of a chain is: "pesticides cause pollution" (fact1) + "pollution can harm animals" (fact2) → "pesticides can harm animals" (conclusion fact). Parts of the concluding fact overlap with the first and the second fact. To construct such a  concluding fact, a useful way is to borrow the subject from one fact and the ending conclusions from another fact.

Q: Fact 1: Temperature falls from lower to higher altitudes. 
Fact 2: Temperatures vary with altitude and season.

A: temperatures vary depending on season.
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Q: Fact 1: Flagella help prokaryotes move. 
Fact 2: Some species swim by means of flagella Bacterial flagella are analogous to flagella of eukaryotes.

A: prokaryotes and Bacteria move by swimming.
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Q: Fact 1: Birds have a large brain relative to the size of their body. 
Fact 2: Experts also say that Corvidae have larger brains relative to body weight than other birds.

A:
Corvidae have a large brain relative to their body size.
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