Answer:
A. When many species share a single ancestor
Explanation:
Answer:
The wolves helped the ecosystem. I know this because of this sentence: The entire ecosystem became degraded until wolves became protected when they were determined to be an endangered species.
Explanation:
Hope this helps
Answer:
The depth at which Drew found the algae
Explanation:
The dependent variable was the depth at which he found the algae, because that is what he measured on each day.
The independent variable was the sky conditions, since that changed from clear to cloudy, which impacted the dependent variable/the depth of the algae.
Hypotheses must be provable. If scientists cannot prove a "hypothesis" right or wrong, they need to change it to a legitimate hypothesis - something you can prove.
If it is proven wrong, they can change certain aspects of it to make a more specific experiment.
50$ or 60$ depending on who you get it from
