La yegua y el burro al cruzarse la descendencia no puede reproducirse desde la clasificación taxonómica ¿por qué pasa este fenómeno? *

humans, along with other animals and plants, have linear chromosomes that are arranged in pairs within the nucleus of the cell. the only human cells that do not contain pairs of chromosomes are reproductive cells, or gametes, which carry just one copy of each chromosome.

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.