Which natural event produces oxygen, which can then be used by humans and other organisms?
a. evaporation of water
b. respiration by consumers
c. photosynthesis by producers
d. chemosynthesis of sulfide

The fauces connects which of th following structures to the oropharynx

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi, r^3 , where r is the sphere’s radius.

Abiologist counts the number of rabbits in a population each year and observes a decrease in population. since the coyote population has exploded, the biologist concludes that the coyote population has had a negative interaction with the rabbit population. which describes the biologist’s actions? a.) experimentationb.) inferencec.) observationd.) interacting