B1 Characteristics of living organisms Flashcards
Define the term Sensitivity
The ability to detect or sense changes in the environment (stimuli) and make responses
Define the term Respiration
The chemical reactions that break down nutrient molecules in living cells to release energy
Define the term Reproduction
The process that make more of the same kind of organism
Define the term Growth
A permanent increase in size and dry mass by an increase in cell number or cell size or both
Define the term Movement
An action by an organism or part of an organism causing a change of position or place
Biological Heirarchy/organisation
atom->molecule->organelle->cells->tissue->organ->system->organism->population->community->ecosystem->biome->biosphere
Biosphere
the part of the Earth where organisms can survive
Hydrosphere
the part of Earth involving water
Lithosphere
the part of Earth involving soil and rock
Atmosphere
the part of Earth involving air
Importance of nutrition
energy and raw materials are needed for growth, tissue repair and assimilation of new materials
Importance of excretion
gets rid of waste and harmful substances inside the body
Importance of respiration
Gives your body the energy that it needs for many processes
Importance of sensitivity
increases chances of survival, allows organimss to respond to danger
Importance of reproduction
keeps life cycle going. Prevents extinction of a speices
