What do the arrows in a food chain show?
The transfer of biomass
What eats what
How many organisms are at each trophic level
What molecules are the building blocks of proteins?
Amino acids
Fatty acids
Sugars
What must be true of a primary consumer?
It eats meat and plants
It eats secondary consumers
It eats plants
What must be true about the bars on a pyramid of biomass?
They decrease in size up the pyramid
They can have a big bar at the top for parasites
They can have a small bar at the bottom representing a tree
What proportion of energy is transferred between trophic levels?
1
0.1
0.9
What proportion of the energy from the Sun is used in photosynthesis?
0.01
Which of these is not true when drawing pyramids of biomass?
Producer at the top
Bars equally spaced around the midpoint
Bars touching
What are the subunits of lipids?
Fatty acids and glycerol
Starch is an example of which type of food molecule?
Protein
Carbohydrate
Why are food chains usually no longer than six trophic levels?
Only 10% of energy is transferred
There are fewer prey than predators
They all start with a producer