Which of the following process add methane ch4 to the atmosphere

How do you transfer mrna into codons ? i'm so confused : (

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

Which of the following statements about protists are true? a. they are typically found in moist environments. b. they are all unicellular. c. they have a nucleus. d. they are all multicellular.