(chemistry) p(otential of) H(ydrogen); the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter; provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral and greater than 7 is acidic and less than 7 is basic).
Meet some of New Zealand's unique fauna, including endemic insects, frogs, reptiles, birds, and mammals, and investigate why many have such distinctive features. You'll also find out about why there are so few native mammals and the impact of introduced pests on the unique natural ecosystems...
Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understand how animals adapt to their habitat. For instance, how animals thrive in aquatic habitat and are able to overcome osmosis. It also sheds light on the reasons animals adapt...
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...
If the balance of nature is left untouched, landscapes can change dramatically over time. A previous ecosystem is superseded by the arrival of a newer ecosystem. This is known as ecosystem succession. Learn more about it here...
Find out more about New Zealand's unique biodiversity by exploring a range of different ecosystems and the key role of some endemic species in these ecosystems...
If New Zealand has lots of unique animals, it's also got a whole lot of unique plants. Find out more about some of them, and the roles they play in different natural ecosystems...
