There are now 100 carbon-14 atoms on the screen.   the half-life of carbon-14 is about 5700 years. if you left those 100 carbon-14 atoms to sit around for 5700 years, how many would you expect to decay during that time?

Describe the iron sulfide hypothesis and the lipid membrane hypothesis.

The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?

Wich is not standing in the way of astronomers getting a good view of different star