Dinosaurs left behind fossils of their bodies in the earth. What does this have to do with fossil fuels?

In the family tree below, people with the recessive trait of attached earlobes are shaded gray.

The relationship between intron and exon

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