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Page

page 1. One side of a leaf of a book or manuscript. Such was the book from whose pages she sang. (Longfellow) 2. A record; a... Read More

Class

Our earth is home to diverse groups of organisms. These living things exist in the ecosystem. Dating back to the ancient... Read More

Adaptive Radiation

Reviewed by: Mary Anne Clark, Ph.D. When Charles Darwin was in the Galapagos Islands, one of the first things he... Read More

Genetics – Lesson Outline & Worksheets

  Topics Modules Quizzes/Worksheets Description Introduction to Genetics Genetics - Definition:... Read More

Heterotroph

Heterotroph Definition What is a heterotroph? Does a heterotroph make its own food? In biology and ecology, a heterotroph... Read More

Offset

offset In general, that which is set off, from, before, or against, something; as: 1. (Science: botany) A short prostrate... Read More

Theory of Neuroscience

Nezih OKTAR Journal of Neurological Sciences (Turkish) 2006, Volume 23, Number 3, Page(s) 155-158. An Open Access... Read More

Color Atlas & Synopsis of Clinical Dermatology

Color Atlas & Synopsis of Clinical Dermatology     ... Read More

Bastard

Bastard 1. Begotten and born out of lawful matrimony; illegitimate. See bastard, note. 2. Lacking in genuineness; spurious;... Read More

Anatolian leopard

The Anatolian leopard (Panthera pardus tulliana) was once described as a distinct subspecies of leopard native to Anatolia... Read More

Offsets

offset In general, that which is set off, from, before, or against, something; as: 1. (Science: botany) A short prostrate... Read More

Arthropods

There are over two million species of arthropods, who initially arrived on Earth in the middle of the Cambrian period.... Read More

Adaptive radiation

Definition noun The diversification of several new species from a recent ancestral source, each adapted to utilize or... Read More

Aspartame

Definition noun An artificial sweetener formed from aspartic acid that is commercially available as a low-calorie sugar... Read More

The Evolution of Cell Organelles

The previous tutorial page noted the emergence of protists, organisms that possessed a distinct cell nucleus and contained... Read More

At Home in the Universe: The Search for the Laws of Self-Organization and Complexity

At Home in the Universe: The Search for the Laws of Self-Organization and Complexity  ... Read More

Simple diffusion

Simple Diffusion Definition What is simple diffusion? In biology, simple diffusion is a form of diffusion that does not... Read More

Lithosphere

Definition of Lithosphere: The earth’s outer solid crust is called Lithosphere. To read more visit to... Read More

Light-independent reaction

The process of photosynthesis is a biological procedure in which plants produce oxygen and energy (sugar) by using light... Read More

Multiple alleles

Alleles are the pairs of genes occupying a specific spot called locus on a chromosome. Typically, there are only two alleles... Read More

The Evolutionary Development of Multicellular Organisms

The beginning of the Cambrian era saw a widespread arrival of multi-cellular organisms, particularly in the form of sponges.... Read More

The Dinosaurs

Everyone has heard about the dinosaurs. No doubt one of the reasons why is because of their size, another being the fact... Read More

Insects

To learn more about arthropods, look at the previous tutorial. The Class Insecta of the Arthropoda Phylum is by far the... Read More

Fish

While insects and similar types of organisms strived to occupy land, the sea was teeming with life aiming to secure their... Read More

Atrioventricular sulcus

Definition noun (anatomy) A sulcus or a groove on the outer surface of the heart marking the division between the atria and... Read More

Growth and Development of a Human Baby

Continued from the initial human reproduction of the previous page in this tutorial. Upon arrival in the uterus, the... Read More

Gene Action – Operon Hypothesis

Reviewed by: Mary Anne Clark, Ph.D. Some genes are switched on or off depending on environmental conditions. The... Read More

Hormone Production

Reviewed by: Mary Anne Clark, Ph.D. Hormones are chemical messengers produced by glands in the endocrine system.... Read More

Chromosome Mutations – II

Reviewed by: Mary Anne Clark, Ph.D. This page is a continuation of the previous tutorial, Chromosome Mutations... Read More

Protein Synthesis

If you have jumped straight to this page, you may wish to look at the previous tutorial about DNA, which gives background... Read More

Protein Variety

The sequence of amino acids determines which type of protein it is. It is synthesized from a DNA strand, each DNA strand... Read More

Passive and Active Types of Immunity

The previous tutorial investigated the role of white blood cells in phagocytosis. White blood cells are also responsible... Read More

What is a species? Definition of species, different approaches

What is the definition of species? What does it take to be considered as a species? Ever since there has been an array of... Read More

sloth bear

Sloth Bear Definition The sloth bear (Melursus ursinus) is a small bear species characterized by having a long lower lip... Read More

Omnivore

Omnivore Definition Omnivores are animals that include both plant and animal matter in their normal diet. They differ from... Read More

Predation

In ecology, predation is a mechanism of population control. Thus, when the number of predators is scarce the number of... Read More

Renaturation

Definition noun, plural: renaturations (molecular biology) The conversion of denatured protein or nucleic acid to its native... Read More

Signature

signature 1. A sign, stamp, or mark impressed, as by a seal. The brain, being well furnished with various traces,... Read More

Cell Biology

It only takes one biological cell to create an organism. In fact, there are countless species of single celled organisms,... Read More

Developmental Biology

For the human species to continue surviving, it is essential that mature adults are capable of producing fertile offspring,... Read More