What is the name of the flap-like cartilage that covers the opening to the larynx during swallowing to prevent food from entering the larynx, trachea, and lungs?

In some plants, pointed leaves (p) are dominant over rounded leaves (p). a plant with a genotype of pp

How does photosynthesis show the conservation of mass and energy?

Which of the following types of pollution is most responsible for large numbers of deaths worldwide because of unsafe drinking water? (a) nutrient pollution (b) thermal pollution (c) pathogen pollution (d) sediment pollution