Search Results for: falls
Northern Africa and biodiversity
Northern Africa and biodiversity Content Partner: United Nations Environment Programme (other articles) Article Topics:... Read More
Darwin and Natural Selection
Reviewed by: Mary Anne Clark, Ph.D. In the 19th century, a man called Charles Darwin, a biologist from England,... Read More
Plant Auxins – Phototropism & Geotropism
As with animals, plants also use a variety of hormones to control their growth and development. A family of hormones called... Read More
Respiration
Organization of the Respiratory System Each lung is composed of air sacs called alveoli - the sites of gas exchange with... Read More
Bone matrix
Bone Matrix Definition Bone matrix refers to the matrix component of bone tissue. It provides the structural framework and... Read More
Polymorphism
Polymorphism Definition The occurrence of two or more different forms or morphs in the population of a species is referred... Read More
Turgor pressure
In biology, turgor pressure pertains to the pressure that is exerted by the fluid (e.g. water) against the cell wall. It is... Read More
Iodine test
Iodine Test Definition The iodine test is a chemical reaction-based identification test for starch. In this test, iodine... Read More
Density dependent factor
Density-dependent factors are the limiting factors of an ecosystem that regulate population growth in a density-dependent... Read More
Classification system
Classification Systems Definition In life, many things are classified, that is, to put into categories or groups based on... Read More
Eucalyptus
Eucalyptus (Science: botany) a myrtaceous genus of trees, mostly Australian. Many of them grow to an immense height, one or... Read More
An introduction to Homeostasis
Researched and Written by Jonjo Minns Submitted to biologyonline.com on February 25, 2009. Published in biologyonline.com... Read More
Threshold trait
Threshold trait A trait that falls into natural groups that originate not in categorically distinct causes but in whether or... Read More
Homeostasis
Homeostasis is the tendency not to stray from the range of favorable or ideal internal conditions. Such conditions must be... Read More
Residual volume
Residual volume is a term that is most often seen in lung physiology where it is defined as the amount of air remaining in... Read More
Natural selection
Natural Selection Definition What is natural selection in biology? Natural selection is defined as a process in nature... Read More
New Zealand’s Biodiversity
Written by: Maria Victoria Gonzaga Peer-reviewed by: Cathy Buntting, Ph.D. and Andrea Soanes Why is New... Read More