In this question, we will understand the air path from entering the nasal passages to reaching the alveoli, where gas exchange takes place.
<h3>What is the air's path to the lungs?</h3>
The air penetrates through the nasal passages, passes through the pharynx, larynx and trachea, bronchi, reaching the lungs where it travels through the bronchioles until reaching the alveoli, where gas exchange takes place. The difference between inspired and expired air is in the concentration of oxygen and carbon dioxide.
a) Blood leaving the air sacs is rich in oxygen gas.
b) When exhaling, the breath is rich in carbon dioxide.
c) If you trace the path of air moving through the respiratory system, it would enter through the mouth and nose. It continues through the pharynx, into the larynx, through the tubes and into the trachea and finally reaches the lungs.
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Sterile powdered agar with nutrients can be mixed with water, heated and then poured into empty petri plates or ready-to-use dishes can be purchased. The undigestible agar is a gelatin-like substance with a semi solid surface on which the bacteria can grow while they consume the added nutrients (like sheep's blood).
According to the principle of segregation, gene pairs for a trait are split during the formation of gametes.
<u>Explanation</u>:
- This segregation was first observed by Gregor Mendel. He used pea plants for studying genetics.
- He crossed the pea plants and he discovered that traits in the offspring are not like the parental plants.
- He understands that alleles encoding the traits of each parental plant are separated during the formation of reproductive cells.
- By this only Mendel observed the principle of segregation. During meiosis only segregation of gene takes place and that produces reproductive cells called gametes.
Vacuole, cell wall, and chloroplast.
