A half life is the amount of time it takes for half of an isotope to decay in a given sample. The half life of carbon 14 (which is an isotope) is 5730 years. Carbon-14 is present in many fossils, hence scientists use this to figure out the age of fossils, this specific usage is called carbon dating.
A claim of effortless weight loss.
I believe that the answer is b. False because just because you don't have any symptoms doesn't mean you never will. For example, I never caught the flu in my childhood. But that doesn't mean I never will.
It is c:Cardiac muscles are voluntary.
Answer: B) Trypanosoma brucei
Explanation:
Trypanosoma brucei is a parasite which belongs to the genus of Trypanosoma. The parasite is distributed by the vector. It causes sleeping sickness in humans. The symptoms associated with the parasite includes the fever, headache, mental confusion, problems in coordination, skin rash, swollen lymph nodes and itching. T. brucei is transmitted by an insect vector to a host mammal.