The expression of cellular molecules
ex: proteins or nucleic acids
Answer: c. Gizzard
Explanation:
The Gizzard or ventriculus is the part of the digestive system of the aves, which acts as a mechanical stomach. It is composed of two sets of muscles that act as a avian teeth. It also posses the thick lining that protects those muscles. The gizzard facilitates the mechanical break down of the food as may be caused by the teeth.
Answer:
Carbondioxide gas, release oxygen and provide food.
Explanation:
Plant absorb carbondioxide gas, release oxygen and provide food to the animals are the was that plants impact the cycle. Plant absorb carbondioxide gas from the surrounding air in the presence of sunlight and absorb water from the soil. Both carbondioxide and water react with each other in leaves producing glucose and oxygen. Glucose is stored in different parts of plant body whereas some oxygen is used by the plant for respiration and the remaining is released in the atmosphere. The food produced in the plant can be eaten by the primary consumer for their growth and in that way the ecosystem moves in forward direction.