1. Trachea itself is not considered a complete organ. It is a part of the breathing system and the only airway to the lungs.
2.Yes rigid organs.
3. Rigid organs constitute part of the endoskeleton of vertebrates.
Answer:
Innate or natural immunity
Explanation:
Innate immunity is a defense system that we are born with and that protects us against antigens. It is the sum of all defense mechanisms that occur naturally to protect an individual from infectious diseases. They are physiological mechanisms that are present throughout the entire animal kingdom and it is an inherent quality of each species.
They are not specific to a given pathogen, nor do they generate memory
Answer:
Phytoplankton use sunlight, carbon dioxide (CO2) and water, in a process called photosynthesis, to produce organic compounds which they use for food and to make their cells. The waste product of photosynthesis is oxygen.
Explanation:
Mature mammalian red blood cells lack nuclei, mitochondria and rough endoplasmic reticulum, they do not contain DNA and consequently, cannot divide. They also cannot synthesise RNA nor synthesise any new proteins, and consequently, have a limited lifespan. Mature red blood cells circulate for about 100–120 days in the body before they are removed by the spleen.
Hope this helps
Answer:
Both aerobic and anaerobic respiration.
Explanation:
Glycolysis may be defined as the process of break down of glucose molecules for the formation pf ATP with the help of enzymes and chemical factors. Glycolysis occurs in the cytosol of the organism.
Glycolysis may occur in the presence of organism known as aerobic respiration. The glycolysis can occur in the absence of oxygen as well known as anaerobic respiration. The steps involved up to the formation of pyruvate molecule from the glucose is same in case of aerobic and anaerobic respiration.
Thus, the correct answer is option (c).
