Answer: lack ejaculation
Explanation: this is due to the fact that the sexual characteristics of an infant is underdeveloped. As the infant grows and reach adulthood, the body becomes able to produce sperm and also enables ejaculation to occur.
Answer: ONLY CERTAIN SUBSTANCES CAN PASS THROUGH IT
Explanation:
1 only gases and water can pass through it.
2 substances need permission to pass through it.
3 only certain substances can pass through it.
4 substances need carrier molecules to pass through it.
5 ATP is always needed to move molecules across the plasma membrane.
I think the answer is the ground water since only 23 percent of the ground water was used by the <span>United States as water source compared to the fresh water which is 77 percent. It is said to be that since 2005 US utilized 349,000 gallons per day. </span>