Todas las células contienen ADN. Algunas tienen envoltura especial conocida cómo membrana nuclear que encierra ese ADN, mientras que otras tienen ADN disperso en el citoplasma. De acuerdo con esta información, podemos clasificar la célula en: A:Unicelulares y pluricelulares.
B:Grandes y pequeñas
C:Poligonales y centradas
D:Procariotas y eucariotas

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.

The starting materials in a nuclear change have a total mass of 2.3465 x 10-27 kg. after the change, the resulting materials have a mass of 2.3148 x 10-27 kg. how much energy was released during the change? 2.85 x 10-12 2.08 * 10-10 j 0 211 * 10-10 j 8.56 * 10-43