In some plant species tallness is dominant to shortness. An F1 plant that is homoozygous for tallness is crossed with a heterozygous F1 plant. What ratio of tall to short plants (tall: short) represents the possible offspring? 3:1

1:3

1:1

4:0

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.

Which of the following is not a symptom of desertification? a) decrease in salt content of the soil b) lowering of the water table c) reduced surface water d) increased soil erosion e) loss of native vegetation

Why did the federal government end its support of yucca mountain as a site for long-term storage of nuclear water