What is the function of palisade mesophyll cells in a leaf?
Specialized for photosynthesis due to high chloroplast concentration
These cells are located in the upper part of the leaf and maximize light absorption.
What are the specialized functions of sperm and egg cells in reproduction?
Sperm cells are specialized for mobility and fertilization; egg cells are specialized for nutrient storage and protection
Sperm cells have flagella for movement, while egg cells are larger and contain nutrients for the developing embryo.
What is the role of root hair cells in plants?
Increase surface area for water and mineral absorption
These cells have long extensions that penetrate soil spaces to enhance uptake.
What is the function of white blood cells?
Involved in immune response to fight infections
They identify and destroy pathogens in the body.
What are the features of erythrocytes?
Flattened, biconcave disc shape, no nucleus, high hemoglobin content
These features facilitate efficient gas exchange and oxygen transport.
What does the biconcave shape of erythrocytes ensure?
Large surface area to volume ratio for efficient gas exchange
This shape allows for more oxygen to be absorbed and released.
How does the lack of a nucleus in erythrocytes benefit their function?
Maximizes space for hemoglobin, allowing more oxygen transport
This adaptation is crucial for maintaining oxygen levels in the bloodstream.
What is active transport?
Movement of substances against a concentration gradient using energy from respiration
This process is vital for nutrient uptake in cells.
Why is it important for plants to select which minerals to transport?
To ensure they acquire only necessary nutrients for growth and development
Some minerals may be toxic or unnecessary for plant metabolism.
What are organelles?
Common features and structures found in all cells with a nucleus
Organelles perform specific functions necessary for cell life.
What is the significance of cell specialization in multicellular organisms?
Different cell types have specific structures and functions to perform unique roles
This allows for complex functions and processes within the organism.
