Embryology is when the system of when the embryo and fetus are being developed
Exothermic reactions lose heat and are hot to the touch (Think explosion)
Endothermic reactions gain heat and are cold to the touch (Think of an instant ice pack where you pop it to make it cold)
Humans did not evolve from chimpanzees or any of the other great apes that live today. We instead share a common ancestor that lived roughly 10 million years ago.
Transparent means all light can shine through. Common substances that are transparent are clear glass, clean water, and cellophane. Translucent means only some light can filter through the substance. Common translucent substances are tissue paper, the skin of your hand, and lamp shades. Opaque means little to no light passes through the substance. Common opaque substances are denim, cardboard, and leather.
I hope this helps. :)