The Precambrian eon is separated from the Phanerozoic eon in the fossil record because of the sudden appearance of organisms.
Explanation:
Precambrian eon is the initial existence on earth that can be predicted by the study of rocks and remaining of fossils. It has been seen as the existence of skeleton in this era, before this era no such things has been observed, even the development of sexual reproduction.
The Phanerozoic era comes after the Precambrian era, more advanced kinds of fossils of animals had been observed in this era. Phanerozoic era period of life on earth. Large organisms sudden appearance are seen in the Phanerozoic era i.e. First dinosaurs, mammals, fishes, angiosperms,first vertebrates etc.
Answer:
ATP stands for adenosine triphosphate. It is a molecule found in the cells of living organisms. It is said to be very important because it transports the energy necessary for all cellular metabolic activities. Without ATP, various metabolic activities in the human body cannot take place.
Explanation:
The endocrine system is made up of glands that produce and secrete hormones, chemical substances produced in the body that regulate the activity of cells or organs. These hormones regulate the body's growth, metabolism (the physical and chemical processes of the body), and sexual development and function
Answer:
Debido a que ocurren las mismas reacciones.
Explicación:
Cuando se lleva a cabo el mismo proyecto pero en un lugar diferente significa que se obtendrán los mismos resultados porque el organismo reacciona igual en cada condición ambiental pero en algún momento se obtendrán resultados diferentes debido al gran impacto de las diferentes condiciones ambientales en el organismo o en el unidad experimental. El organismo tiene el mismo tipo de reacción en diferentes ubicaciones o lugares, por lo que podemos decir que se obtendrán los mismos resultados al realizar el mismo experimento en diferentes ubicaciones.
I'm pretty sure, that there should be an options to choose. Anyway, I know the answer: The endosperm is formed by a fusion between the<span> polar nuclei</span> and <span>the sperm nucleus</span>.