Compare gas and nutrient requirements for autotrophs and heterotrophs

Question 1

Compare needs of energy/nutrients in plants animals and bacteria

Answer 1

Plants: light for photosynthesis
Animals: mainly complex carbohydrates
Bacteria: chemoautotrophs require inorganic chemicals such as sulfur dioxide
autotrophs require light

Question 2

Compare needs of simple chemicals in plants animals and bacteria

Answer 2

Plants: water and carbon dioxide for photosynthesis, oxygen for cellular respiration
Animals: water and oxygen for cellular respiration
Bacteria: all need water, some need oxygen and chemosynthetic bacteria require other chemicals such as sulfur dioxide or carbon dioxide

Question 3

Waste removal needs

Answer 3

Plants: in the daylight surplus oxygen via stomates
Animals: carbon dioxide and urea
Bacteria: varies wildly but includes carbon dioxide methane and metal sulfides