Biogeography is the study of geographical distribution of fossils, various species (plants and animals) and ecosystems throughout geological time and space
Answer:
years
Explanation:
Given-
Half life of 
C 
years
As we know -
Where
Mass of radioactive carbon after a time period "t"
initial mass of radioactive carbon
radioactive decay constant
time
First we will find the value of "k"
On solving, we get -
Now, when mass of 14C becomes 
% of the plant material on earth today, then its age would be
years
Malaria is transmitted when an infected female Anopheles mosquito. These are the only mosquitos that can spread malaria. It can also get transmitted when the mosquito drinks from an infected person, and thus they pass it on to their next victim.
They both utilize their ability of photosynthesis.
