What is the energy of the hydrogen ion gradient created across the inner mitochondrial membrane used to make?
a. o2
b. atp
c. glucose
d. high energy electrons

Fossils can only be formed when? if mud, silt or tar is in the area to preserve the fossil ierosion does not occur and allows the fossil to form oxygen and microorganisms cannot decay the bones the area is dry and does not contain mud or silt

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

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