In an estuary a zooplankton consumes a phytoplankton with a small globule of PCBs attached to it. A fish consumes the zooplankton as well as many other zooplankton. A larger fish consumes the small fish and then a gull consumes the larger fish. The increased concentration of the chemical at the top of the food chain is an example of biomagnification. bioaccumulation. synergistic properties. PCB persistence. synergistic interactions.

it is a. i hope this .

the answer u all are looking for is 4000000000000000000000 million years.

carbon traps heat so more of it makes it hotter causing global warming. during the ice age carbon levels in the atmosphere were low so it got very cold. so the common things between them is carbon levels in the atmosphere.

the ems is the abbreviation for the emergency medical services. it is a service provided by a group of medical professionals specialised doctors and other healthcare staff.

any one can call 911 in case of any medical emergency and a group of health care professional will come and give the treatment required. every day the ems staff receive many phone call, which are related to different types of medical emergencies, out of which 25-28% are exclusively related to the respiratory issues.

so, the correct answer is 25-28%.