Once you burn the fuel you used you cant reuse the burned fuel.
Answer: Some algal (algae) species can act both as "plants" and as "animals" at the same time. As “plants” the algae produce their own food and as “animals” they can eat other plants or even their own grazers.
Answer:
<h2>The owl would have more bones.</h2>
Explanation:
<h2>You will find more bones in an owl's cast because they haven't been digested as well as those from a hawk.</h2>
Alpha Centauri d is the sure fire answer
