Do Organisms always Evolve into more Complex Forms
By: David Wright
Evolution by definition is the gradual change in a species or population in order for that organism to be better adapted and hence more able to survive, which could either involve a loss or gain in complexity.A key here is to define complexity, do...
By: Ogo A. Bellard
The general theory that humans have essentially stopped evolving has never sat well with me. For why should that be the case, what could have told our DNA to stop adapting to its situation, like it has been doing since the first strand of DNA...
By: Kimberly Lester
Beneath the chilly and murky waters of the deep, swims one of the planet's oldest living species of predators; the shark; whose origins predate the dinosaur by 200 million years. Some scientists speculate that the very first ancestor of the shark was called Cretolamna, who...
By: I. Ramjohn
Life as we know it could not exist without plants (and other green photosynthetic organisms like cyanobacteria and algae). Plants produce the oxygen upon which most living things depend. Since it is constantly being used for respiration, all living things that use oxygen are supported...
By: David Wright
Mitosis is the process by which eukarotic cells divide, the two daughter cells produced are identical (with a few mutations): in addition to this there is another important difference, that is that the cells produced are diploid (2n) rather than haploid (n) as is the...
By: Perry McCarney
RNA (ribonucleic acid) is a type of vital organic molecule that enables our bodies to be built from the blueprints of the DNA (deoxyribonucleic acid) inherited from our parents. Without RNA life would not be possible, not only for us but for all organisms, be...
By: I. Ramjohn
While small organisms can transport material from one cell to another by diffusion, this process is too slow for larger organisms. Most plants need to move water and minerals a considerable distance from the roots to the rest of the plant. Similarly, sugars need to...
By: Kyle Bynum
It's 2:00 A.M. Michael, 54, has just been admitted into the emergency room. He has hemorrhaged in his brain, an incident that modern science calls a stroke. If Michael survives, he could face paralysis, loss of normal brain function, and other serious effects. But...
By: David Wright
The endoplasmic reticulum is an organelle found in eukaryotes consisting of a continuation of the nuclear membrane in cisternae that are held in shape by various cytoskeletal systems. These membranes enclose a region from the cytoplasm and so can form vesicles that can eventually leave...
By: Ian Loft
Sharks are the great scavengers of our oceans and as a species predate dinosaurs where the oldest fossils are believed 400 million years old, perhaps more. They are predators belonging to the class of Chondrichthyes'; that is: species having a skeleton comprising of cartilage. An...

 

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