Answer:
4) It allows the exchange of nutrients between the embryo and the mother, while at the same time filtering out harmful material.
Explanation:
The placenta is an organ present in all mammals. She is confirmed between the 6th and 8th week of pregnancy and has as main function the exchange of substances between the mother and the fetus. Among these substances are nutrients, gases and even secretions. The placenta also has the function of fighting infections and promoting immunity to the fetus, in addition, it can act as the lung, the intestine and the liver, while the fetus does not develop its organs.
Organisms tend to be larger in size at higher trophic levels, but their smaller numbers result in less biomass. biomass is the total mass of organisms at a trophic level.
Answer:
Nine
Explanation:
These are called carrier proteins, and they have what it is called: solute-binding sites, that when saturated, they are considered "full".
Each different amino acid needs a separate carrier protein to move it across the plasma membrane, so that's 3, then the four different sugars need separate carriers as well, we add 4 more then, we have 7 so far, finally the 2 different ions use 2 more, plus the other 7, totals 9.
Answer: The lipids and proteins that make up the membrane allow it to be selective about what enters and leaves the cell."
Explanation:
Answer:
mechanical energy
Explanation:
When digesting the food, it does turn into chemical energy but that chemical energy turns into mechanical energy to use your mucles.
