The answer is A, because the phytoplankton is the foundation of this food web. Without your foundation, "the building will begin to crumble".
Fossils up to 75,000 years old can be dated with Carbon-14.
Radio isotopes can be used for the age determination of the fossils. Carbon-14 is a common isotope which is used for that purpose. But the half- life of the Carbon-14 is relatively small as 5730 years. That means the amount of Carbon-14 will be half after every 5730 years. Hence, decay is very fast. So Carbon-14 cannot be used forage determination which is more than 75000 years due to the low accuracy.
Answer: Paramecium are heterotrophs.
Explanation: Their common form of prey is bacteria. A single organism has the ability to eat 5,000 bacteria a day. They are also known to feed on yeasts, algae, and small protozoa.
Hope this will help
Answer: coal
Explanation: coal is formed when layers of peat are compressed by the layers of rocks above.
