Blogs Posts in Biology category; 612 blog posts

Core Intelligence

Nearly a century ago, British psychologist Charles Spearman started what remains one of the most passionate debates about people's mental abilities. Spearman declared in 1904 that he had found the way to measure an individual's core intelli [...]

Posted On : Mar, 28 2007 | Comments : 0

Stages of Photosynthesis

Photosynthesis is a two stage process. The first process is the Light Dependent Process (Light Reactions), requires the direct energy of light to make energy carrier molecules that are used in the second process. The Light Independent Pro [...]

Posted On : Mar, 27 2007 | Comments : 0

Prokaryotic Cell Division

Prokaryotes are much simpler in their organization than are eukaryotes. There are a great many more organelles in eukaryotes, also more chromosomes. The usual method of prokaryote cell division is termed binary fission. The prokaryotic chro [...]

Posted On : Mar, 27 2007 | Comments : 0

The Nucleus

The nucleus is the location for most of the nucleic acids a cell makes, such as DNA and RNA. Danish biologist Joachim Hammerling carried out an important experiment in 1943. His work showed the role of the nucleus in controlling the shape a [...]

Posted On : Mar, 27 2007 | Comments : 0

Theory Of Evolution

Robert Hooke, one of the first scientists to use a microscope to examine pond water, cork and other things, referred to the cavities he saw in cork as cells, Latin for chambers. Mattias Schleiden concluded all plant tissues consisted of cel [...]

Posted On : Mar, 27 2007 | Comments : 0

Evolution

Mammals developed from primitive mammal like reptiles during the Triassic Period, some 200-245 million years ago. After the terminal Cretaceous extinction eliminated the dinosaurs, mammals as one of the surviving groups, underwent an adapti [...]

Posted On : Mar, 26 2007 | Comments : 0

Animal Organs

We are all familiar with many of the organ systems that comprise the body of advanced animals such as the circulatory system, nervous system, etc. More of us are aware of the essential nature of the immune system in these days of HIV, AIDS, [...]

Posted On : Mar, 26 2007 | Comments : 0

Plants

A plant has two organ system, the shoot system and the root system. The shoot system is above ground and includes the organs such as leaves, buds, stems, flowers and fruits. The root system includes those parts of the plant below ground, su [...]

Posted On : Mar, 26 2007 | Comments : 0

Biologists Produce Global Map of Plant Biodiversity

Biologists have produced a global map of estimated plant species richness. Covering several hundred thousand species, the scientists say their global map is the most extensive map of the distribution of biodiversity on Earth to date. The m [...]

Posted On : Mar, 25 2007 | Comments : 0

Spermists And ovists

Dutch microscopist Anton van Leeuwenhoek discovered animalcules in the sperm of humans and other animals. Some scientists speculated they saw a little man inside each sperm. These scientists formed a school of thought known as the spermists [...]

Posted On : Mar, 24 2007 | Comments : 0

Dark Reaction

Carbon Fixing Reactions are also known as the Dark Reactions or Light Independent Reactions. Carbon dioxide enters single celled and aquatic autotrophs through no specialized structures, diffusing into the cells. Land plants must guard agai [...]

Posted On : Mar, 24 2007 | Comments : 0

Cell Movement

Cell movement is both internal, referred to as cytoplasmic streaming, and external, referred to as motility. Internal movements of organelles are governed by actin filaments and other components of the cytoskeleton. These filaments make an [...]

Posted On : Mar, 24 2007 | Comments : 0

How A Scientific Thought Is Developed?

A scientific thought is simply starts with Observation which means defining the problem you wish to explain. Once the problem defined then you make the Hypothesis, one or more falsifiable explanations for the observation. Then through Exp [...]

Posted On : Mar, 24 2007 | Comments : 0

How Blood Cells Change Shape

Millions of times during their four-month lifespan, human red blood cells must squeeze through tiny capillaries to deliver their payload of oxygen and pick up waste carbon dioxide-functions essential to life. Now, for the first time, resea [...]