Life Functions Quiz

What is the process by which food is broken down into simpler substances in the body?

• digestion

• respiration

• excretion

• absorption

Which life function involves the removal of waste products from the body?

• excretion

• digestion

• circulation

• respiration

What is the purpose of reproduction in living organisms?

• To create diversity within the species.

• To increase the lifespan of individuals.

• To ensure the continuation of the species and pass on genetic information.

• To provide a source of entertainment for humans.

Which life function is responsible for the increase in size and number of cells in an organism?

• growth

• respiration

• metabolism

• reproduction

What is the term for the process of taking in and using nutrients for growth and energy?

• digestion

• metabolism

• respiration

• excretion

Which organ is responsible for the digestion of food in the human body?

• liver

• heart

• brain

• stomach

What is the main function of the excretory system in the body?

• Transport nutrients

• Regulate body temperature

• Produce hormones

• Remove waste products

What is the process by which organisms produce offspring of their own kind?

• reproduction

• fertilization

• mutation

• photosynthesis

Which life function is necessary for the repair of damaged tissues in the body?

• regeneration

• excretion

• digestion

• respiration

What are the essential substances that organisms need to obtain from their environment for proper functioning?

• heat, electricity, carbohydrates, fats

• carbon dioxide, sunlight, vitamins, proteins

• water, oxygen, nutrients, minerals

• air, sunlight, carbohydrates, proteins