What types of questions are scientists asking about limb regeneration?

Modern whales developed their traits through natural selection what occurs during the process of natural selection

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

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