A. Checking your understanding I. Answer to the following questions: 1.
What do all living organisms require?
2.
What is primary source of energy for living system?
3.
What is bio-energy?
4.
How many types of energy changes in living organisms are there?
5.
What are examples of energy transformation?
II. There are several definitions in the text. What are they? Complete the sentences. 1)
… is the capacity to do work.
2)
… is energy that flows in the living system.
3)
… - in which green plants transform radiant solar energy into
chemical energy that gets stored as potential energy in carbohydrates.
4)
… - in which chemical energy is transformed into light energy.
5)
… - in which chemical energy is transformed into electrical energy.
6)
… - in which chemical energy is transformed into mechanical energy.
7)
… is a classic example of energy transfer in the living system.
8)
… is the study of changes in energy as it flows through a living
system.
III. Are these sentences true or false? 1.
The primary source of energy for living system is solar radiation.
2.
The radiant energy of sunlight can be utilized directly by all living
organisms.
3.
All energy conversions in the living system are governed by certain
invariable principles called laws of thermodynamics.
4.
The ATP molecules don’t transfer energy to other biological
molecules.
5.
Living organisms restore their lost energy either directly from
sunlight (as in green plants) or from their food molecules (as in other
organisms).
