During which period did the first vascular plants appear? a. cambrian b. ordovician c. silurian d. devonian

Which pedigree symbol is used to represent a female carrier of a recessive x-linked trait? поө0 || save and exit submit

Animals that have thick fur and ae able to store large amounts of body fat live where ?

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