The arterial end is the part where the blood enters from the capillaries into the alveolus. The PO2 at the arterial end has a lower concentration of oxygen that is the PO2 is 40 and once this blood enters the alveolus the oxygen from the air in the alveoli dissolved in the blood hence increasing the PO2 of the air. The PO2 of the air remains the same until it reaches the body part where the oxygen is again consumed. Hence the option PO2 in the capillaries is lower than the PO2 in the alveoli is the right option
Answer:
your body can't break foods down so that nutrients can be fully absorbed
Explanation:
Without them, your body can't break foods down so that nutrients can be fully absorbed. A lack of digestive enzymes can lead to a variety of gastrointestinal (GI) symptoms. It can also leave you malnourished, even if you eat a nutritious diet.
Only the strongest live on to pass on their genes. the weak die
Answer:
B. The cell cannot be a human
Explanation:
Humans have 23 pairs of chromosomes, or 46 individual chromosomes. Mutations in humans usually cause there to be a single extra chromosome, or a single missing chromosome. A mutation would not cause there to be 64. So, A cannot be true. Prokaryotic cells usually have one chromosome, not 64, so C cannot be true. D cannot be assumed as you cannot tell if there is uncontrolled cell growth. Therefore, the answer would be B.
Answer:
The battery is the set of vertical lines at the bottom, so there's one battery.
The switches are the line between the small circles (they're closed here) there are 2 of them.
The circles with Xs inside are bulbs.
So B is correct.
