How does a photo-voltaic cell convert light to electricity a: light turns a turbine b: light boils water that creates a current c: light excites electrons that create a a current d: light is stored and changes with heat and pressure (science) pls now

Which of the four major uses is predicted to change the least by 2020?

What is the membrane that sheath of schwann cell containing cytoplasm and nucleus that encloses myelin

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