Which of these factors is a disadvantage of hybrid cars? A. Less gasoline is required.
B. They produce fewer emissions than standard cars.
C. Federal incentives reduce the initial cost.
D. Replacement batteries are expensive.

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What is the most abundant vertebrate on earth?

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