A 22-year-old previously healthy man presents complaining of a month of fever, red eyes, and joint pain. Physical exam reveals brownish-red macules with hyperkeratotic crusted centers on the palms of his hands. He was recently treated for chlamydial urethritis. What is the most likely diagnosis?
A. Coxsachkievirus infection.
B. Henoch-Schonlein purpura.
C. Kaposi sarcoa.
D. Reactive arthrits.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.

its b. greenhouse gasses trap uv rays for heat so that the plants stay alive.