Woody plants, such as trees, tend to have more genetic diversity, on the whole, than vascular plants, such as grasses. Part of the diversity is due to the size of each species' geographic range and how far they can move their genetic information, for example through wind pollination or animal seed dispersers
Genetic diversity tells about the uniqueness of organisms. This is achieved by how these organisms are able to inter relate with each other in ways that include passing on genetic information during reproduction.
This is determined by the population of the organism and the ease in which reproduction occurs between organisms.
Examples include woody plants having more diversity than vascular ones due to woody plants having more agents and plant parts that supports pollination and reproduction.
Another example include different species of dogs living together and cross breeding with one another.
Photosynthesis and cellular respiration are complementary because both depend on the inputs and outputs of both processes to continue. Photosynthesis requires CO2, which cellular respiration outputs and cellular respiration needs oxygen which photosynthesis makes.