Unit 4 Cell Transport: What are three major molecules that enter the cell?

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.

What is the process by which biological parents pass traits such as hair type or eye color to their children

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