What is the factor that likely poses the greatest threat of extinction of species worldwide is

Each trait of a plant is determined a. an allele b. one gene c. a pair of genes d. one dominant gene

The many volcanoes located along the edge of the pacific ocean make up the ring of fire. how does subduction play a role in the volcanic activity in the ring of fire?

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes