Smaller organisms need less energy per gram of body weight than do larger organisms.
Energy transfer between organisms normally involves conservation of heat energy.
Energy flow between trophic levels is inefficient.
Chemical energy is converted into radiant energy, which is then converted to chemical energy at the next trophic level.
Selective hybrid elimination
The allele for PKU is located on the Y chromosome.
PKU is a dominant trait.
PKU is a recessive trait.
A mutation occurred in the sperm of the son.
Paramecia feeding on green algae
Mice feeding on seeds
Deer feeding on branches of trees
Slugs feeding on mushrooms
Less than 6 inches
Greater than 7 inches
Between 6 and 8 inches
Between 5 and 7 inches
Reflexive but not transitive
Symmetric but not transitive
Transitive but not symmetric
Both symmetric and transitive
Here's an interesting quiz for you.