1.1 characteristics of living things Flashcards
define movement
an action by an organism or part of an organism causing a change of position or place.
define respiration
the chemical reaction in cells that break down nutrient molecules and release energy for metabolism.
define sensitivity
the ability to detect or sense stimuli in the internal or external environment, such as light, temperature, water, gravity and chemical substances, and to make appropriate responses
define growth
a permanent increase in size and dry mass by an increase in cell number and/or cell size.
define reproduction
the process of producing offsprings.
define excretion
removal from organisms of the
waste products of metabolism (chemical
reactions in cells including respiration),
toxic materials, and substances in excess of
requirements
define nutrition
the process by which organisms obtain energy and raw materials from nutrients such as protein, carbohydrates and fats.