Según la Teoría del origen químico, ¿Cuáles fueron las fuentes energéticas que hicieron que reaccionasen entre sí los compuestos de la atmósfera y que se formasen las primeras biomoléculas que posteriormente darían lugar a los seres vivos? a) La radiactividad.
B) La energía solar, únicamente.
C) La energía producida por los volcanes.
D) Las radiaciones solares y descargas eléctricas de relámpagos y rayos.

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat

Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel

Once an egg cell is fertilized by sperm, the cell then, as the embryo develops, it receives nourishment and eliminates wastes by transferring substances from its blood to its mother's blood. a. becomes a fetus immediately and exits the womb b. begins to divide and implants itself in the wall of the uterus c. remains in the uterus without dividing for several months d. travels back to the ovaries until the fetus is developed