TASK DEFINITION: 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.
PROBLEM: Fact 1: irradiating food can be used to kill existing microorganisms in the food. 
Fact 2: Food irradiation is blazingly high-tech.

SOLUTION: a blazingly high-tech method can be used to kill existing microorganisms in the food.

PROBLEM: Fact 1: Secondary growth forms secondary vascular tissues and bark. 
Fact 2: Trees have the ability to undergo secondary growth and produce a woody body.

SOLUTION: trees form secondary vascular tissues and bark.

PROBLEM: Fact 1: Ribosomes are structures in the cytoplasm where proteins are made. 
Fact 2: Ribosomes are larger and distinct from the ribosomes found in prokaryotes.

SOLUTION:
prokaryotes can make proteins.