B An ecosystem because it is i dont know how to explain but i think is that one
Answer:
Temperate deciduous forest
Explanation:
rain forest soil is highly acidic as its what trees there rely on for absorbing nutrients. The type pf clay present there also has poor ability to trap nutrients so they usually get washed away. Its almost the opposite for deciduous forests.
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.
Answer:
1. a
2. b
Explanation:
I'm sorry I know only these 2 :)
I’m not to sure about this
