Is sex necessary for reproduction?
By: Jennifer Allsbrook
Sex. Copulation. Coitus. Intercourse. All are synonyms for the act that delivers sperm, the male sex cell, into the body of a female. This, however, is only one strategy used by organisms to reproduce. Reproduction is one of the most fundamental characteristics of life and...
Why fish swim in schools
By: Anne StClair
Almost 80% of adults of the known species of fish swim in schools, at least during part of their life cycle, and they do this mainly because of two simple facts of nature: 1. Big fish eat little fish, and 2. There is safety in...
Why fish swim in schools
By: Mary Tyrer
"Why do fish swim in schools? Is the old joke often told, the answer. “To make them smart," has merit. In reality, not many species of fish swim together in what we call schools. However, the ones' that do display this behavior use...
How the octopus reproduces
By: Anne StClair
With eight poisonous tentacles, the octopus obviously reproduces with great care! The female has to choose particularly wisely too, because she dies when her young hatch, so her first choice of mate is also her last. The male does not fare much better, living only...
How sonar affects whales
By: Jyoti Joshi
How Sonar affect whales:Sonar Systems! Sonar systems produce intense waves of sound that just goes in the ocean like a light and it reveals objects in the path or tracks any activity under water. As a result it affects the habitat in the water body...
Saprophytes: Parasites living on animals
By: Janet Grischy
Beside the narrow roads at Lassen Volcanic National Park grow plants that look somewhat like tall red hyacinths. That sketchy description doesn't do them justice though; they're gorgeous. They're called Snow Plants. Their scarlet spears stand out vividly against the gray-green pines in the last...
The difference between bacteria and viruses
By: Tami Port MS
Bacteria and viruses are often lumped together into a general category of "bad things that can cause infection". But these two types of infectious agents are very different, and the differences are important to your health. * What Is a Cell? * Bacteria are living...
Why fish swim in schools
By: Mjrinella
There's safety in numbers. Children form close groups of friends that are nearly inseparable, so they never can be singled out for bullying. Buffalo stay close for higher odds of survival. If a predator were to approach them, they'd be among ten. Most predators wouldn't...
What is polymerase chain reaction
By: Debbie Luyo
Polymerase Chain Reaction (PCR ) is a technique that utilizes the enzyme DNA polymerase for making copies of a gene, gene fragment, or specific DNA or RNA sequence. DNA polymerase is the enzyme that catalyzes replication and repair of DNA. PCR is a requisite tool...
By: Tami Port MS
The location of the peptidoglycan polymer in the cell walls allows for bacterial identification, differentiating Gram+ from Gram- cells. * What Is Peptidoglycan?* Peptidoglycan is a huge polymer composed of interlocking chains of identical monomers, the backbone composed of two derivatives of glucose: N-acetylglucosamine...

 

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