2. Suponga que un animal diploide tiene un número de cromosomas igual a 16. Con base en esto responda las preguntas. a. ¿Cuántos cromosomas tiene una de las células de su piel?

Which statements explains what the fossil records indicates? check all that apply. a) earth is 4.5 billion years old b) many organisms have become extinct c) mammals have always existed on earth d) mass extinctions have occurred several times on earth e) the amount of water on earth has decreased over time?