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Posted: Mon Oct 20, 2014 5:14 pm
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Posted: Mon Oct 20, 2014 10:46 pm
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Posted: Mon Oct 20, 2014 11:13 pm
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A dragonfly is an insect belonging to the order Odonata, the suborder Epiprocta or, in the strict sense, the infraorder Anisoptera (from Greek ανισος anisos, "uneven" + πτερος pteros, "wings", because the hindwing is broader than the forewing). It is characterized by large multifaceted eyes, two pairs of strong transparent wings, and an elongated body. Dragonflies can sometimes be mistaken for damselflies, which are morphologically similar; however, adults can be differentiated by the fact that the wings of most dragonflies are held away from, and perpendicular to, the body when at rest. Dragonflies possess six legs (like any other insect), but most of them cannot walk well. Dragonflies are among the fastest flying insects in the world. Dragonflies can fly backwards, change direction in mid-air and hover for up to a minute.
Dragonflies are major predators that eat mosquitoes, and other small insects like flies, bees, ants, wasps, and very rarely butterflies. They are usually found around marshes, lakes, ponds, streams, and wetlands because their larvae, known as "nymphs", are aquatic. About 5,900 different species of dragonflies (Odonata) are known in the world today of which about 3000 belong to the Anisoptera. [wikipedia]
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Currently there is much confusion over what a “species” actually is. A snail with a different color or shape to its shell could be a totally different species. This is simply variety within the snail kind, but not evidence of evolution. They still have the same DNA which allows that variety.
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Posted: Tue Nov 11, 2014 12:17 pm
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Posted: Tue Nov 11, 2014 4:24 pm
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Posted: Wed Dec 24, 2014 2:51 pm
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Biologist Discovers 70-Year-Old Crustacean
The California spiny lobster, Panulirus interruptus, is a species of spiny lobster found in the eastern Pacific Ocean from Monterey Bay, California to the Gulf of Tehuantepec, Mexico. It typically grows to a length of 30 cm (12 in) and is a reddish-brown color with stripes along the legs, and has a pair of enlarged antennae but no claws. The interrupted grooves across the tail are characteristic for the species.
Females can carry up to 680,000 eggs, which hatch after 10 weeks into flat phyllosoma larvae. These feed on plankton before the metamorphosis into the juvenile state. Adults are nocturnal and migratory, living among rocks at depths of up to 65 m (213 ft), and feeding on sea urchins, clams, mussels and worms. The spiny lobster is eaten by various fish, octopuses and sea otters, but can defend itself with a loud noise produced by its antennae. The California spiny lobster is the subject of both commercial and recreational fishery in both Mexico and the United States, with sport fishermen using hoop nets and commercial fishermen using lobster traps.
Source: Wikipedia
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Posted: Wed Dec 24, 2014 3:38 pm
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The nautilus (from the Latin form of the original Greek ναυτίλος, 'sailor') is a pelagic (The pelagic zone occupies 1,330 million km3 (320 million mi3) with a mean depth of 3.68 km (2.29 mi) and maximum depth of 11 km (6.8 mi). Fish that live in the pelagic zone are called pelagic fish. Pelagic life decreases with increasing depth.) marine mollusc (not everyone agrees with this classification) of the cephalopod family nautilidae, the sole extant family of the superfamily nautilaceae and of its smaller but near equal suborder, nautilina. It comprises six living species in two genera, the type of which is the genus Nautilus. Though it more specifically refers to species Nautilus pompilius, the name chambered nautilus is also used for any species of the nautilidae.
Nautilidae, both extant and extinct, are characterized by involute or slightly evolute shells that are generally smooth, with compressed or depressed whorl sections, straight to sinuous sutures, and a tubular, generally central siphuncle. Having survived relatively unchanged for millions of years (if you believe in an old earth), nautiluses represent the only living members of the subclass nautiloidea, and are often considered "living fossils." The nautilus has a camera lens eye. which is a pinhole eye. According to those who adhere to evolution is a very primitive type eye. Quote: "Coleoid cephalopods have an elaborate camera eye whereas nautiloids have primitive pinhole eye without lens and cornea." Source: www.ncbi.nlm.nih.gov/pubmed/23478590 So it is strange that it would not have evolved a better eye given the length of time it has been around.
Source: wikipedia
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Posted: Sat Jan 17, 2015 4:22 pm
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Posted: Thu Jan 22, 2015 2:26 pm
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Posted: Thu Mar 12, 2015 2:24 am
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