Identifying euglena in water
By: Sandra Petersen
If you see a marine or freshwater pool with algae growing in it, you are bound to find Euglena specimens there as well. Because euglenids are single-celled organisms, you cannot see them by just looking unless there are thousands or millions of them. To see...
The reproductive process of seahorses
By: Lesley Hebert
Seahorse reproduction is a legendary case of parental role reversal.When the female produces her eggs, she gives them to the male to care for. The male seahorse is a devoted father. He carries the eggs inside a special brood pouch, undergoes bodily changes that...
Scientists discover over 180 species of biofluorescent fish
By: Leigh Goessl
Biofluorescene is a spectacular creation of nature. It is a phenomenon, as Wired puts it, "a few lucky animals, such as jellyfish and corals," have observed, but it is not something man has ever gotten a good glimpse of to see exactly what happens...
What is endocytosis?
By: Alicia M Prater PhD
Endocytosis is the process of bringing something into a cell without its passing through the cell membrane via transport. This is particularly important for polar or very large molecules. There are three generally accepted mechanisms for endocytosis: phagocytosis, pinocytosis, and receptor-mediated endocytosis.All of the...
What is exocytosis?
By: Alicia M Prater PhD
Exocytosis is a process by which cells expel something, generally large particles that cannot pass through the cell membrane. The basic process is an intracellular vesicle merging with the membrane and opening up so its contents face the extracellular milieu (see an animation). It is...
How feathers evolved
By: Janet Grischy
Feathers evolved before birds could fly. Birds evolved directly from the archosaurs, developing the internal temperature regulation that reptiles lack. Or possibly the avians evolved from dinosaurs that were direct descendants of the archosaurs, arising from theropods like Tyrannosaurus rex. Crocodilians like the American alligator...
Spider webs: A new study about their electrostatic charge
By: Merryl Lentz
Spiders webs are beginning to weave an intriguing new story of how they ensnare their prey. Capture of flying and crawling fodder may not just be a lucky accident – for the spider – but the result of an electrostatic interaction between web and insect...
Differences between the Dromedary camel and the Bactrian camel
By: Lesley Hebert
Bactrian camels and dromedary or Arabian camels are large animals known for their humps, their amazing capacity to survive in extremely dry conditions, and their ability to transport people across arid deserts.Bactrian camels probably originated in the cold deserts of the central Asian steppes...
Zoo orangutans are given iPads
By: Lesley Hebert
One of the burning questions that animal rights activists might be tempted to ask is: What does a zookeeper do with a bored orangutan?Well, that question was answered when Michigan-born wildlife activist Richard Zimmerman suggested giving iPads to apathetic apes, and launched Apps for...
Tree profiles: Ponderosa pine
By: Rex Trulove
Ponderosa pines are fairly common trees in the United States, particularly in the west. They have several traits that tend to set them apart from many other pines however. Fully grown, this is a pine that is hard to mistake for other species. This is...

 

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