Coal is solid rock that began as organic material that was deposited in a swamp. the formation of coal suggests that a. geologic processes continue over millions of years. b. coal is made mostly of skeletal remains of animals. c. coal is formed from magma that has solidified over time. d. it quickly becomes petrified when water is removed.

just go with your heart buddy

bc blah

explanation:

bc blah

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.