Epstein-Barr virus (EBV) is an important human pathogen that establishes a lifelong persistent infection and for which no precise animal model exists.Agents representing EBV and sets of B and T lymphocytes move and interact on a three-dimensional grid approximating Waldeyer’s ring, together with abstract compartments for lymph and blood.
Answer:
The need for continental time zones stemmed directly from the problems of moving passengers and freight over the thousands of miles of rail line that covered North America by the 1880s. Since human beings had first begun keeping track of time, they set their clocks to the local movement of the sun.
Answer:
Homologous chromosomes are paired early in the cell reproduction process. and one pair of sex chromosomes The autosomes carry the genes that determine most body characteristics
Explanation:
Each plant contains a branched system of tubes called xylem, which is responsible for water transport from the roots<span> (where it is taken up) to the leaves (where it is used in </span>photosynthesis<span>).
hope this answers your question</span>
