Natural ecosystems are able to maintain a vibrant diversity of life because they incorporate intricate recycling systems that conserve essential materials.
Answer:
d. all of the above
Explanation:
The three are cultural symbols of Oklahoma.
The historic Route 66 rans through the middle of the state, including the city of Tulsa, the second-largest in the state.
American Indian heritage is also important in Oklahoma. The entirety of Oklahoma used to be Indian reservation territory, and there are still important Indian reservations there.
Finally, cowboy culture is also remarkable. Oklahoma has been a state with an important livestock sector economy, and cowboys used to be employed en masse in the nineteenth century and early twentieth century.
The statement is true.
As weird as it may sound, helium was indeed first discovered on the Sun, and after some time on Earth. The first evidence of helium was observed on August 18 1868, as a bright yellow line with a wavelength of 587.49 nanometers in the spectrum of the Sun's chromosphere. This line has been detected by a French astronomer by the name of Jules Janssen during a total solar eclipse in Gantur, India.
Answer:
Today the world's population is 7.5 billion. The world's population is changing because of the natural increase rate. The natural increase rate is the crude birth rate minus the crude death rate. Since the crude birth rate is higher than the crude death rate today, this would lead to a higher natural increase rate.
Explanation:
