Which of the following are elements? Select all that apply. Hydrogen (H)
Oxygen (0)
Hydrogen gas (H2)
Water (H20)

Which of the following is an advantage of solar energy?

Which organisms have pharyngeal arches that develop from all three germ layers and go through the same development stages as embryos? 1.bird 2.ladybug 3.starfish 4.snake

If two parents who's blood types are both b produce a child that has blood type o, what can you say about the parent's genotybes? oa) one is ii ob) one is ibi oc) both are bi od) nothing, this is impossible