Answer:
El sistema nervioso se relaciona con el sistema reproductivo, ya que se recibe la estimulación externa e interna y envía información para preparar al organismo para la reproducción, así las hormonas y los neurotransmisores responden fisiológicamente por medio del sistema nervioso periférico-autónomo, preparando al Cuerpo para el acto sexual y posteriormente fecundacion
Although the operation of natural selection requires that genotypes differ in fitness, for some geneticists it seems easier to understand natural selection than fitness. Partly this reflects the fact that the word “fitness” has been used to mean subtly different things. Here I distinguish among these meanings (e.g., individual versus absolute versus relative fitness) and explain how evolutionary geneticists use fitness to predict changes in the genetic composition
Arteries carry blood to different parts of our body. They divide into branches called capillaries to supply blood to even small organs. So, we compare arteries with tree that divides into smaller and smaller branches. Capillaries again merge and form veins to collect impure blood
Answer:
4 chromosomes
Explanation:
Scientists often study fruit flies because they have large chromosomes whose genes are easy to see. Every body cell of a fruit fly has 8 chromosomes. Every fruit fly gamete (sperm or egg) has 4 chromosomes.
