The atmosphere consists of which concentrations of gases found in the troposphere?
Select one:
O a. 21% ozone (O3); 78% carbon dioxide (CO2);
0.0034% nitrogen (N2)
O b. 0.0034% carbon dioxide (CO2); 21% oxygen
(02); 78% nitrogen (N2)
O c. 0.0034% oxygen (O2); 78% carbon dioxide (CO2);
21% nitrogen (N2)
O d. all atmospheric ozone (03)
O e. 78% methane (CH4); 21% oxygen (O2); 0.0034%
carbon dioxide (CO2)

Amniocentesis is a process in which amniotic fluid is taken from the mother's womb to identify any genetic abnormalities in the fetus. how would the discovery of the human genome contribute to this process?

Rarefaction is used for which of the following? a. creating a representative sample b. studying how disease impacts populations c. rediscovering species thought to be instinct d. determining which sea creatures live in an area

What is the main difference between the central nervous system (cns) and the peripheral nervous system (pns)? .the cns involves the brain and spinal cord, and the pns involves the body nerves. the cns involves the body nerves, and the pns involves the brain and spinal cord. the cns involves sensory neurons, and the pns involves motor neurons. the cns involves motor neurons, and the pns involves sensory neurons.