¿cuántos cromosomas tiene la célula madre del esquema de la meiosis? ¿y las dos células deja que resultan de la primera division? ¿y las cuatro que resultan de la segunda?

List two modern organisms that have pentameral symmetry

How do you date a sample of rock that you suspect as being one of the earliest on earth

Which of the following types of pollution is most responsible for large numbers of deaths worldwide because of unsafe drinking water? (a) nutrient pollution (b) thermal pollution (c) pathogen pollution (d) sediment pollution