Density
1. (Science: radiology) The amount of darkness or light in an area of a scan reflects the compactness and density of tissue. Differences in tissue density are the basis for CT and MR scans.
2. (Science: microscopy) logarithm to the base 10 of the reciprocal of transmittance.
This lesson looks at population attributes, regulation, and growth. It also covers population genetics, particularly genetic variations, natural selection, genetic drift, genetic migration, and speciation...
Regulation of Biological Systems tutorials are focused on the modulation of biological systems from cell to population levels. The course starts with the principles of negative feedback control, and how it regulates blood sugar, water, and temperature in humans. It, then, culminates in the population regulation and ecosystem succession. Learn the various regulatory mechanisms that..
With regard to the population size of a species and what factors may affect them, two factors have been defined. They are the density-dependent factors and the density-independent factors. Find out the differences between the two in this tutorial. Know how these factors affect populations in an ecosystem...
Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons and the zooplanktons. Learn the differences between the two in this tutorial...
Mātauranga Māori is the living knowledge system of the indigenous people of New Zealand, including the relationships that Māori have with the environment. This lesson uses the Toheroa Abundance Project as an example of how Mātauranga Māori is influencing ecological outcomes. The lesson is designed to showcase the value of indigenous cultural perspectives and knowledge of the world around us. ..
Learn about community patterns and the ecological factors influencing these patterns. Revisit some of the ecosystems you've learned about earlier to learn more about the possible impacts of natural and human-induced environmental changes...
