The exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli. You can see more in wikipedia, or here: https://www.merckmanuals.com/home/lung-and-airway-disorders/biology-of-the-lungs-and-airways/exchanging-oxygen-and-carbon-dioxide
Abiotic. The sun is not living nor has it ever lived.
Answer:
2-Every individual in a species of wolf is killed by hunters or lack of food.
Explanation:
The logistic growth curve is given by the differential equation,

When the rate of change in population approaches the maximum carrying capacity, the curve starts to flatten or become saturated.
The left hand of the differential equation becomes zero and attains a steady state equilibrium at,


Hence, at
.
The right end of the logistic growth curve shows the flattening of the curve while reaching the maximum carrying capacity.