Proteins, such as the enzyme lysozyme, have a secondary structure and a tertiary structure.
(1) Describe the secondary and tertiary structure of an enzymatic protein, such as
lysozyme.

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.