Porque el ventriculo izquierdo tiene una pared muscular mas potente que la del ventriculo derecho?

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

Which best describes carbon dioxide’s path out of the body

Is becoming less expensive to screen blood samples for dna certain diseases have genetic basis what is possible ethical concern about the availability of inexpensive dna testing