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: Algae have varied life cycles. 
Fact 2: Coccolithophorids are members of the Algae.
Coccolithophorids have varied life cycles.

Fact 1: fossils are formed when layers of sediment cover the remains of organisms over time. 
Fact 2: All streams carry sediment .
Fossils are formed when layers of something streams carry cover the remains of organisms over time.

Fact 1: Sporangia produce spores that develop into tiny, heart-shaped gametophytes. 
Fact 2: Blood is pumped around the body by a heart .

Sporangia produce spores that develop into tiny gametophytes shaped like the organ that pumps blood.