To provide mechanical support and withstand environmental stresses
This allows for easy flow of
Water and dissolved minerals throughout the plant
Xylem Cells lack
Internal structures such as nucleus, cytoplasm, vacuole, and chloroplasts
Lignin's function in Xylem Cells is
To provide mechanical support to the cell walls
Xylem Cell Walls are
Thick with Lignin, providing mechanical support
Diffusion
The movement of particles from an area of higher concentration to an area of lower concentration due to random motion.
Oxygen (O2)
Enters cells through plasma membranes; essential for cellular respiration, energy production, and maintenance.
Carbon dioxide (CO2)
Leaves cells through plasma membranes; a byproduct of cellular respiration, waste product.
Urea (CO(NH2)2)
Leaves cells through plasma membranes; a byproduct of protein breakdown and waste product.
Infection with a pathogen causes an allergy
True. Infection with a pathogen can trigger an allergic response, leading to conditions like asthma and dermatitis.
Asthma and dermatitis are allergy-related conditions
True. Asthma is a chronic respiratory disease caused by an allergic response, while dermatitis is a skin condition characterized by rashes and itching.
A food allergy is an immune system overreaction to a specific food
True. Food allergies occur when the body's immune system reacts to a specific food, such as peanuts or milk, and can cause symptoms like hives, itching, and digestive issues.
Infections can trigger allergic responses, but food allergies are separate
True. Infections can lead to allergic responses, such as asthma and dermatitis, but food allergies are distinct reactions to specific foods.