Q: Answer the following question given this paragraph: Q: In biological augmentation, ecologists use what to add essential materials to ecosystems? A:

OPTIONS:
- sediments
- fluids
- stem cells
- organisms

A: organisms

Q: Answer the following question given this paragraph: Carbon moves through ecosystems in two cycles that overlap. In the biotic cycle, it moves between living things and the air. In the abiotic cycle, it moves between the air, ground, and oceans. By burning fossil fuels, humans have increased the amount of carbon dioxide in the air. Q: In what part of the carbon cycle does carbon move between living things and the air? A:

OPTIONS:
- endothermic cycle
- envelop cycle
- abdaspac cycle
- biotic cycle

A: biotic cycle

Q: Answer the following question given this paragraph: The reaction is exothermic and thus the sign of the enthalpy change is negative. Q: What enthalpy change is observed in an exothermic reaction? A:

OPTIONS:
- positive
- no change
- entropy
- negative

A: negative

Q: Answer the following question given this paragraph: Some parasites kill their host, but most do not. It's easy to see why. If a parasite kills its host, the parasite is also likely to die. Instead, parasites usually cause relatively minor damage to their host. Q: What is likely to happen to a parasite if it kills its host? A:

OPTIONS:
- it thrives
- it adapts
- it mutates
- it dies

A:
it dies