A species which is a good indicator of the living conditions in a particular habitat. The peppermoth will express a black phenotype in a polluted atmosphere and a white phenotype in a clean air atmosphere. In this case, the peppermoth is a good indicator Species for measuring pollution.
Certain species are capable of expressing characteristics indicative of the state of the ecosystem they occupy. They are called indicator species. Endangered species are those that face the risk of extinction. Get to know more about these species in this tutorial...
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...
This tutorial elucidates body temperature regulation. Know the details here to learn how the body sets the body temperature within the homeostatic range...
Plants, like animals, produce hormones to regulate plant activities, including growth. They need these hormones to respond well to their environment and to sustain growth, development, and dispersal. Plant biologists recognize five major groups of plant hormones: auxins, gibberellins, ethylene, cytokinins, and abscisic acid. Find out in this guide the importance of each hormone in the life of a plant...
This tutorial elaborates on the effect of light on plant growth. It describes how different plants require different amounts of light in a day. The amount of time that a plant requires is called the critical period. Learn more about this topic in this tutorial...