Tobacco mosaic virus (TMV) is a simple rod-shaped helical virus that contains single stranded RNA situated at its middle and is surrounded by a protein coat called capsid. After tobacco mosaic virus enters its infected host cells through mechanical inoculation, it removes its capsid to release its single stranded viral nucleic acid which is then transported into the nucleolus. The single stranded viral RNA actuates the production of specific enzymes (RNA polymerases) and it also produces another RNA strand (replicative RNA). The new viral-RNAs are transported from the nucleus into the cytoplasm and functions as messenger-RNAs (mRNAs). Each mRNA, ribosomes, and t-RNA, of the infected host cell all controls the production of protein subunits (capsomeres). After the production of the preferred capsomeres, the new viral-RNAs arrange the capsomeres around it which lead to the production of a complete virus particle (virion). The viruses then migrate from one cell to another. Hence, creating organized infection.
Answer:
When two or more atoms link up, they create a molecule . A molecule of water is made of two atoms of hydrogen (H) and one atom of oxygen (O). The molecular mass is the sum of the masses of all the atoms in the molecule. A collection of molecules is called a compound.
Explanation:
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Answer:
animals are the only organisms that compete for resources
Explanation:
this is due to the fact that plants take up resources passively, a method which doesn't require them to waste any energy, however in the case of resources, is not very effective. suppose there was a bit of water scarcity in your area, and a plant and you both need water for survival. obviously, the plant cant possibly do anything to receive these resources, as it is just a plant. its survival is based merely on the chance that you pour water into it. this is not the case for animals, which, like us, actively collect and gather resources, and use them to our advantage. therefore, animals are the only animals that compete for resources
