What was the ratio of tall to short plants in the F2 generation of Mendel's experiments? O A. 6:1 B. 3:1 : O C. 1:1 D. 2:1​

What is the difference between the conducting zone and the respiratory zone of the respiratory system? the conducting zone is a series of cavities and tubes that move air to the respiratory zone where gases exchange with the bloodstream. the conducting zone exchanges gases between the lungs and the alveoli and the respiratory zone is a series of cavities and tubes that move air to the conducting zone. the conducting zone moves oxygen into the cells and the respiratory zone takes carbon dioxide away from the cells. the conducting zone moves oxygen into the bloodstream and the respiratory zone takes carbon dioxide away from the bloodstream.

According to the cladogram, which organisms have roundworms as a common ancestor?

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million