Question 4
every population of animals has an age structure, a graphical representation of the distribution of age groups within the population
while each individual in a population has a specific age, individuals themselves do not have an age structure. age structure is
therefore an example of a property.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

the answers are a and c

the missing space is phylum

those characteristics are cellular organization, reproduction, metabolism, homeostasis, heredity, response to stimuli, growth and development, and adaptation through evolution. some things, such as a virus, demonstrate only a few of these characteristics and are, therefore, not alive