Stars are mostly made up of what element? A. Carbon
B. Oxygen
C. Hydrogen
D. Helium

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm

How do the evolutionary chart and the video support the claim that all living things are made up of cells?

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