12 Questions
What are the processes that perform the maintenance job in living organisms called?
Life processes
What is the process called that transfers a source of energy from outside the body of an organism to the inside?
Nutrition
Why is energy needed for the maintenance job in living organisms?
To prevent damage and break-down
What kind of molecules do most food sources for organisms on Earth contain?
Carbon-based molecules
Why do different organisms use different kinds of nutritional processes depending on the complexity of carbon sources?
To utilize the carbon-based molecules effectively
Why are a series of chemical reactions in the body necessary for converting energy from food into usable forms?
To provide a uniform source of energy for maintaining living structures and growth
What do we call the process of acquiring oxygen from outside the body and using it in the break-down of food sources for cellular needs?
Respiration
Why might a single-celled organism not need specific organs for taking in food, exchange of gases, or removal of wastes?
Because the entire surface of the organism is in contact with the environment.
Why is a transportation system needed in multi-cellular organisms for carrying food and oxygen from one place to another in the body?
Because all parts of the body need food and oxygen, which are taken up at one place.
What are the by-products created when chemical reactions use the carbon source and oxygen for energy generation?
Waste by-products
Why are waste by-products needed to be removed from the body and discarded outside?
Because they are not only useless for the cells but could even be harmful.
Why does a transportation system in multi-cellular organisms need to transport waste away from cells to excretory tissues?
To discard waste outside the body through a process called excretion.
Learn about the maintenance functions in living organisms that keep them alive even when they are not actively engaged in tasks. Understand the importance of energy transfer for sustaining life processes.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
