By: Gillian Taber
Our bodies are complicated and endlessly fascinating. It is estimated that there are roughly 10,000 trillion cells in the average human body, although estimates vary hugely and as many as 50 trillion cells has also been given as an average. The cell is one...
Animal behavior: Is nature or nurture more important?
By: James Johnson
There are two basic theories used to explain animal behavior, nature and nurture. Animal rights and even scientists argue them almost constantly as to which is the most important. The disagreement has been going on for centuries and will likely continue on into the distant...
Animal behavior: The differences between "nature" and "nurture"
By: James Johnson
There are two basic theories used to explain animal behavior, nature and nurture. What exactly are they and how are they different. Are they mutually exclusive or can they be combined? Let's first define what they are. Nature refers to the natural instincts of a...
Animal behavior: Is nature or nurture more important?
By: Amie Hare
To answer this long standing question one must first understand what is nature and what is nurture. Nature is genetics, the traits animals inherit from their families or bloodlines. Nurture is the outside world, the environment one is put in. The question of which is...
Pre-Darwinian evolutionary theory
By: Tami Port MS
You may believe Darwin the alpha and omega on evolutionary thought, but the proponents of Larmackianism, Catastrophism and Uniformitarianism paved the way.* Jean Baptiste Chevalier de Lamarck 1744-1829 *Jean Baptiste Chevalier de Lamarck was the first evolutionary theorist to very publicly proclaim his ideas...
Polymerization of nucleotides into nucleic acids
By: Tami Port MS
Nucleic acids are the vital genetic blueprint, messengers and builders of the cellular world. Deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are the genetic material of cells. Prior to cell division, a new copy of the DNA genome must be made. And in order for...
How science is now able to fix defective mtDNA in the fertilized egg
By: Tami Port MS
How many people does it take to make an embryo? It may sound like a rather simple question or even bizarre riddle, but the recent announcement that British scientist have created an embryo with DNA from three people has caused a bit of a stir...
Factors that led Darwin to formulate his theory of evolution: Uniformitarianism, population dynamics and the Galapagos
By: Tami Port MS
After graduating in 1831 with a respectable degree in theology from Cambridge, Charles Darwin went on to pursue his life-long interest in the natural world. Much to his father's dismay, the 22-year old graduate joined a British Naval mapping expedition aboard the H.M.S...
Eukaryotic cell endomembrane system
By: Tami Port MS
The cell's endomembrane system consists of the rough and smooth ER, Golgi apparatus, vesicles and plasma membrane, all working together to transport cellular materials.* Eukaryotic Cells * Eukaryotes are organisms composed of cells that have their genetic material encased within a nuclear membrane, the...
Eukaryotic cell structure and function
By: Tami Port MS
Eukaryotic cells possess several critical differences from prokaryotic cells, including a nucleus and other membrane-bound organelles. Here is a summery of some of the defining characteristics of the cell of eukaryotes (plants, animals, fungi and protists).* Two Basic Types of Cells *All cells fall...

 

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