¿Qué significa célula eucariota o eucarionte?

In which situations is the principle of cross-cutting relationship useful in determining relative age?

Which ideas did your answer contain? check all that apply. no food for organisms no oxygen in the atmosphere no trees or flowering plants no products based on trees or plants (building materials, medicines, fuels, fibers) no fossil fuels

Nucleic acid certain protein cell membranes certain carbohydrates