HbA HbS
is the correct answer, just tested it
Through parents having intercourse, so the genes are passed on to generation to generation,
Answer:
C, It took Earth this long to cool enough to form rocks.
These are fun facts about greenhouse gases that...
1.) The three greenhouse gases that are of most concern are Carbon Dioxide (CO2), Nitrous Oxide (N2O), and Methane (CH4).
2.) Greenhouse gases trap heat in the atmosphere warming the Earth’s temperature above freezing. This is known as the Greenhouse effect.
3.) Greenhouse gases are naturally produced; however humans produce additional amounts of certain greenhouse gases.
According to https://umanitoba.ca/faculties/afs/discovery_centre/greenhousegas/media/Fun_Facts_.pdf