The question asks to identify the organisms that utilize tracheae for respiration. This requires knowledge of the respiratory systems of different animal groups.
Correct Option: C) Insects — Insects possess a unique respiratory system consisting of a network of tubes called tracheae that open to the outside through spiracles. This system directly delivers oxygen to their tissues.
The question asks about the respiratory mechanism of earthworms. To answer this, one needs to recall the basic biology of earthworms, specifically how they exchange gases with their environment.
D) Through moist skin. Earthworms respire through their skin, a process known as cutaneous respiration. Their skin is thin, permeable, and kept moist by mucus, which facilitates the diffusion of gases (oxygen in, carbon dioxide out) directly between the environment and their circulatory system.
This question asks about the physiological changes that occur in the diaphragm during the process of inhalation. Understanding the mechanics of breathing, specifically how the diaphragm and intercostal muscles work to change thoracic cavity volume and pressure, is key to answering this.
Correct Option: B) Moves down
During inhalation, the diaphragm contracts and flattens, moving downwards to increase the volume of the thoracic cavity, which in turn draws air into the lungs.
The question asks about the end products of aerobic respiration. We need to recall the biochemical pathway of aerobic respiration and identify its final outputs.
Correct Option: C) Carbon dioxide and water
The question asks for the primary reason to cover one's nose while sneezing. We need to consider the biological function of a sneeze and its implications for public health.
Correct Option: C) To prevent spreading foreign particles. Covering your nose (and mouth) while sneezing is a crucial public health measure to contain the expelled respiratory droplets that may contain viruses, bacteria, and other irritants, thereby preventing the spread of illness to others.
This question asks about the composition of inhaled versus exhaled air. The key to answering this is understanding the process of respiration in the human body, specifically gas exchange in the lungs.
Correct Option: D) Carbon dioxide