¿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?

Which of the following statements is true? 1. the mantle of the earth is made of solid nickel and iron. 2. the crust of the earth is made of solid nickel and iron. 3. the inner core is made of solid nickel and iron.

Glycogen is an energy-storage molecule in humans. a hormone that is called insulin controls the storage of glycogen in the liver. insulin is made up of amino acids.

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?