Tobias has mononucleosis. mononucleosis is a disease that tires and weakens the body. it is caused by a contagious virus that is transferred through direct contact. which would be the best explanation of how tobias contracted mononucleosis? tobias never exercised and was more susceptible to the virus. as a male, tobias has a better chance of getting mononucleosis. tobias inherited the gene from his parents. tobias drank from a water fountain that was contaminated.

The answer is D but there is more than one type of Mono, for example you can be born with it if your mother had it. The type I'm talking about is much less common and can't be spread to others. I know this cause I was born with it.

answer; ///(b) it is composed of four protein chains and four heme groups;

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.