No.
it makes my foot bigger
True.
yes because they came from egg just like mosquetos
If the animal comes from an egg it will get its nutrients from the yolk. If it is a mammal it will get it from the umbilical cord.
An embryos is made when the fertilised egg cell divides in form a ball of cell which is an embryo.
Chickens have an actual shell. The shell along with the embryo is called an egg. Human embryos are inside a females' womb which is made of skin, not keratin like egg shells are.
15mm
respiration
Seeds contain embryos to provide an energy source for the plant when it starts to shoot out of its seed. Think of it like the yoke for a chicken inside an egg. The yoke is the embryo of the egg.
the sex of all embryos is decided when the sperm meets the egg. The egg is x and the sperm is either x or y. If y then it is a male and x is female.
They both hatch out of an egg
Most don't. They are just unfertilized animal embryos