Which of these are characteristics of viruses? (Select all that apply.) - not living organisms
- are decomposers
- are single-celled
- cannot reproduce without a host

there is no stairs in bungalow

explanation:

poof

i think its white blood cells

i hope this

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.