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.

Fact 1: Electron transport is the final stage of aerobic respiration. 
Fact 2: Electron transport is like a waterfall.
Transport like a waterfall is the final stage of aerobic respiration.

Fact 1: Some mollusks are nearly microscopic. 
Fact 2: Interestingly, a squid is also a mollusk.
Some squids are nearly microscopic.

Fact 1: Monotremes are mammals that reproduce by laying eggs. 
Fact 2: Echidnas are monotremes, or egg laying mammals.

An echidna reproduces by laying eggs.