all the plants will be replenished
Answer:
A) species with short reproductive cycles
The answer is C, twisted ladder
In humans, the yolk sac is the
site of origin for blood cells and primordial germ cells. The human yolk sac is
a membrane located outside the embryo and it is connected by a tube through the
umbilical opening to the embryo's midgut. The yolk sac serves as an early site
for the formation of blood and in time, is incorporated into the primitive gut
of the embryo.
Are you looking for projects like experiments?
