Mendel began his experiments with purebred pea plants. this approach enabled him to determine that variations among offspring were the result of * 20 points

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

The idea that all living things are made up of cells is considered scientific law. this means the idea is an emerging scientific idea that has a logical explanation. has been tested with similar results at least twice. is supported by scientific consensus and a large amount of evidence. has been rejected only once by the scientific community

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled