How many atoms of each element does sodium carbonate, na2co3, contain? sodium = 1 atom, carbon = 2 atoms, oxygen = 3 atoms sodium = 1 atom, carbon = 1 atoms, oxygen = 3 atoms sodium = 2 atoms, carbon = 1 atom, oxygen = 3 atoms sodium = 2 atoms, carbon = 3 atom, oxygen = 3 atoms

In a cladogram' when does a group of organisms branch off

1. fold your hands together so your thumbs cross over ,and look at your thumbs. which thumb feels most "comfortable" on top is actually controlled by a gene. the left thumb folding over the right thumb is a domi

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