the characteristics of life / food Flashcards
what are metabolic reactions controlled by?
enzymes
what is the definition of an organism?
an organism is a living thing
what is the definition of metabolism?
this is the sum of all the chemical reactions in an organism
what is the definition of the continuity of life?
the continuity of life means that living things arise from other living things.
what is the definition of organisation?
organisation means that living things are composed of cells,tissues,organs.
what is the definition of nutrition?
nutrition is the way organisms obtain and use food
what is the definition of excretion?
excretion is the removal of waste products of metabolism from the body.
why is excretion important?
it provides a healthy balance between their outside and inside enviroments.
what are the 3 main points about living things?
- Composed of tiny units called cells which are highly organised.
- They use food to grow and move.
- they reproduce and pass information on from generation to generation.
what is the definition of anabolic metabolism?
also known as constructive metabolism, anabolic metabolism is all about building and storing.
what is the definition of catabolic metabolism?
the process of breaking down large, complicated molecules into smaller ones in order to produce energy.
what are the 5 characteristics of life?
- Organisation
- Nutrition
- Excretion
- Response
- Reproduction
what is a biological catalyst?
an enzyme
what are 3 points about asexual reproduction?
- No sex cells are produced
- offspring is identical to parent
- One parent is involved
what are 3 points about sexual reproduction?
- Male and female sex cells are produced
- Offsprings are similar to parents
- Two parents are involved
