B1 - characteristics of living organisms

Question 1

what are the characteristics of living organisms?

Answer 1

MRS GREN

movement, respiration, sensitivity, growth, reproduction, excretion and nutrition

Question 2

define movement.

Answer 2

it’s an action by an organism or part of an organism causing a change of position or place

Question 3

define respiration.

Answer 3

it’s the chemical reactions in cells that break down nutrient molecules and release energy for metabolism

Question 4

define sensitivity.

Answer 4

it’s the ability to sense or detect stimuli in the internal or external environment and to make appropriate responses.

Question 5

define growth

Answer 5

it’s the permanent increase in size and dry mass by an increase in cell number or cell size or both.

Question 6

define reproduction

Answer 6

it’s the process that makes more of the same kind of organism

Question 7

define excretion

Answer 7

it’s the removal from organisms of waste products of metabolism (chemical reactions in cells including respiration) toxic materials and substances in excess of requirements.

Question 8

define nutrition.

Answer 8

it’s the taking in of materials for energy, growth and development. Plants require light, carbon dioxide, water and ions while animals require organic compounds, water and ions.