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LIVING THINGS
N/A
20
Science
7th Grade
10/05/2010

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Cards

Term
3 MAIN FUNCTIONS OF ALL LIVING THINGS
Definition
NUTRITION, INTERACTION WITH THE ENVIRONMENT and REPRODUCTION
Term
NUTRITION
Definition
The process which allows living things to obtain ENERGY.
Term
AUTOTROPHS
Definition
Obtain their energy to survive from inorganic substances like water, mineral salts and carbon dioxide.
Term
HETEROTROPHS
Definition
Also known as CONSUMERS, get their energy from organic matter: living things and their remains.
Term
INTERACTION WITH THE ENVIRONMENT
Definition
Refers to the ability of living things to react and adapt to the changes that occur around them.
Term
REPRODUCTION
Definition
Refers to the capacity of living things to create new living things.
Term
ASEXUAL REPRODUCTION
Definition
Living things that are capable of reproducing on their own.
Term
SEXUAL REPRODUCTION
Definition
Requires living things of different sexes.
Term
C, O, H, N
Definition
Carbon, Oxygen, Hydrogen and Nitrogen: the 4 chemical substances which living things are made up of.
Term
INORGANIC SUBSTANCES
Definition
Do not contain carbon (C) and are present in both living and non-living things.
Term
WATER (H2O)
Definition
Makes up 74% of plants and 60% of animals.
Term
MINERAL SALTS
Definition
Inorganic substances which form bones, teeth, shells and are present in fluids like blood, tears and sweat.
Term
ORGANIC SUBSTANCES
Definition
Their principal element is carbon (C) and some examples are: glucides, lipids, proteins, vitamins and nucleic acids.
Term
CELLS
Definition
The smallest unit of life.
Term
PROKARYOTIC CELLS
Definition
Are simpler than eukaryotic cells and have no nucleus.
Term
EUKARYOTIC CELLS
Definition
More complex than prokaryotic cells and have a nucleus. Fungi, algae, plants and animals have this type of cell.
Term
PLANT CELLS
Definition
Have a rigid wall, are polyhedral and the nucleus is found on one side.
Term
ANIMAL CELLS
Definition
Have a softer wall, are differently shaped and their nucleus is in the middle.
Term
UNICELLULAR
Definition
Have only one cell.
Term
MULTICELLULAR
Definition
Have many cells.
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