AP BIOLOGY

ECOLOGY

ENERGY FLOW AND PRIMARY PRODUCTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Animals are consumers, meaning they need to eat food for energy because they cannot make their own. Which energy transformation is taking place when an animal eats food so it can keep warm? (chemical-stored in the bonds of glucose and other sugars, mechanical-movement, thermal = heat, radiant-sun)
A
Mechanical to thermal
B
Mechanical to radiant
C
Chemical to thermal
D
Radiant to chemical
Explanation: 

Detailed explanation-1: -Chemical energy is transformed into heat and thermal energy. Animals are consumers, meaning they need to eat food for energy because they cannot make their own.

Detailed explanation-2: -When animals eat plants and the sugar they contain, the chemical energy is converted into either mechanical energy (movement of the animal) or thermal energy (body heat). A small amount of the chemical energy is also converted into electrical energy for the nervous system.

Detailed explanation-3: -The chemical energy in the food gets changed into the mechanical energy of moving muscles.

Detailed explanation-4: -When we switch on an electric bulb, electric energy is converted into light energy and heat energy. This happens because of heating effect of electric current.

Detailed explanation-5: -Energy is transferred between organisms in food webs from producers to consumers. The energy is used by organisms to carry out complex tasks. The vast majority of energy that exists in food webs originates from the sun and is converted (transformed) into chemical energy by the process of photosynthesis in plants.

There is 1 question to complete.