Alfred Wegener suggested the continents were once connected but now moving apart. Why did geologists mock him and refuse to accept the idea?

Which organelle breaks down sugar molecules that supply energy to the cell ?

List five ways we are indebted to phytoplankton

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