Which of the following processes releases carbon into the air?   formation of coal  ocean circulation  photosynthesis  respiration

Which best explains why viruses do not have special structures or enzymes that allow them to make their own food? viruses can use energy in living cells that they infect. viruses can replicate inside a host that they infect. viruses can cause contagious illnesses in host cells. viruses integrate their rna or dna into infected cells.

2points what is the term for a female reproductive cell? a. egg b. chromatid c. allele d. fertilization

Which geologic feature would most likely be represented by contour lines john far apart from one another? a cliff a hill a plain a valley