Hey mate!
You stuck?
Humans use selective breeding to pass desired TRAITS on to the next generation of organisms.
Hope this helped!
Answer:
pre zygotic barriers including temper isolation
Thomas huxley = his findings made the theory of evolutions became widely accepted
Ernst Mayr = the one who proposed Biological species concept
Herbert spencer = found similarities between societies within humans and animal
Stephen Gould = the one who contributed to the study of fossils
hope this helps
Well, when chromosomes cross over during prophase 1 of meiosis, the homologous pair of chromosomes exchange segments of DNA which happen to be the genes. So the significance of crossing-over during prophase 1 is that it adds genetic variation to sexually reproducing organisms.
Berry- Tomato
Pome- Apple
