D: All the variables are controlled except one.
Abiotic factors in common ecosystems:
1: Bats are interesting creatures, and use echolocation to make food
2: The cave walls help spread the voices of the bats
3: They have to use echolocation to breathe
Biotic factors:
1: Some good roles for bats are predators
2: They effect the system of computers when they bite computer chips
3: They complex human system life<span />
Answer:
Element
Explanation:
Is a substance that can't be broken down into other substances.
Answer:
Ribose and Deoxyribose.
Explanation:
They are both important components of nucleotides, and are found in RNA and DNA.
Hope I helped!