Class 10 (Science Assignment)

Physiological Structure and Life Processes

Which organelle is known as the powerhouse of the cell?
A. Nucleus
B. Ribosome
C. Mitochondria
D. Vacuole
Which tissue is responsible for transporting water and minerals in plants?
A. Phloem
B. Xylem
C. Epidermis
D. Parenchyma
Which part of the human respiratory system is the main site of gaseous exchange?
A. Trachea
B. Bronchus
C. Alveoli
D. Larynx
Which component of blood transports oxygen to body tissues?
A. Plasma
B. Platelets
C. White blood cells
D. Red blood cells
What is the main function of the kidneys?
A. Pumping blood
B. Digesting food
C. Removing nitrogenous wastes from blood
D. Producing oxygen
Which process allows green plants to prepare their own food?
A. Respiration
B. Transpiration
C. Photosynthesis
D. Excretion
Which hormone regulates the level of glucose in the blood?
A. Thyroxine
B. Insulin
C. Adrenaline
D. Estrogen
What is the main function of the nervous system?
A. Digestion of food
B. Transportation of oxygen
C. Coordination and control of body activities
D. Removal of wastes
Which structure prevents food from entering the trachea during swallowing?
A. Diaphragm
B. Epiglottis
C. Alveolus
D. Pharynx
Which life process is responsible for the removal of metabolic wastes from the body?
A. Nutrition
B. Respiration
C. Excretion
D. Reproduction

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