Lisa is making a drawing the to show how currents of air move from tropical regions to the polar regions. She wants include the source of the energy that causes these wind currents. What source of energy should Linnea show in her drawing?

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