1. Air enters the nostrils.
2. Air passes from the trachea to the bronchi
3. Air diffuses from the alveoli to the blood cells.
4. Oxygen enters the blood cells.
5. Blood transports oxygen to other cells.
Answer:
The number of offspring produced is often related to the amount of parental care. Typically, the higher fecundity, the lower the amount of time parents devote to caring for the offspring.
Answer: Your answer is B
Explanation: Because unicellular organism are very simple organisms such as bacteria.
Endocrine system consist of endocrine glands that produces hormones. This hormones are carried by blood to their sites of function
