Describe the specific adaptations of red blood cells, white blood cells, and sperm cells, and explain the consequences of damaged white blood cells. Compare plant and animal cells.

b) The cells are modified as follows to perform their specific functions:

• Red blood cells (A) are biconcave discs, lack a nucleus and most organelles to maximize space for hemoglobin, which binds and transports oxygen efficiently.
• White blood cells (B, specifically neutrophils) have a lobed nucleus and are capable of amoeboid movement to squeeze through blood vessel walls. They perform phagocytosis, engulfing and destroying pathogens.
• Sperm cells (C) have a tail (flagellum) for motility to swim towards the egg, an acrosome containing enzymes to penetrate the egg, and numerous mitochondria in the midpiece to provide energy for movement.

c) If the blood cells labeled B (white blood cells, specifically neutrophils) are damaged, the patient's immune system would be severely compromised. This would lead to a reduced ability to fight off infections, making the patient highly susceptible to various diseases and illnesses.

d) Plant and animal cells differ in several key ways:

• Cell wall: Plant cells have a rigid cell wall made of cellulose outside the cell membrane, providing structural support and protection. Animal cells lack a cell wall.
• Chloroplasts: Plant cells contain chloroplasts for photosynthesis, allowing them to produce their own food. Animal cells do not have chloroplasts.
• Vacuole: Plant cells typically have one large, central vacuole that stores water, nutrients, and waste, and helps maintain turgor pressure. Animal cells may have small, temporary vacuoles or none at all.
• Shape: Plant cells have a fixed, often rectangular shape due to the cell wall. Animal cells have a more flexible and often rounded or irregular shape.