Cnidarian's Basic Body Plan

The further examination of Tiktaalik’s fins revealed that it had wrists, similar to a human body. Tiktaalik’s wrists allowed it to maneuver its way to the base of shallow bodies of water.

I believe the Ambulocetus was the first organism in whale evolution to live primarily in the water, this is due to the fact that the Ambulocetus whale had a hard time staying on land due to its weak legs that could not support its heavy body.

“Everything in Australia is trying to kill you, haven’t you heard?” (Rosalind James). Physalia, or Portuguese Man of War, is a salt water species of hydrozoa that thrives in dead zones of tropical and subtropical waters. The animal is often confused with a jellyfish, but it actually is a siphonophore. Blue Bottle, Physalia, is not just a multicellular creatures called zooids. The zooids work together to provide defense, help with feeding, to produce offspring, find a safe habitat, and use all the tools necessary to live a full life. While movement and shape are uncontrollable, they play a vital role in the creature living. The Portuguese Man of War is a beautiful creature that plays in an important role in the ecosystem

The evolutionary path of a whale is a fascinating process of a terrestrial mammal that evolves into a marine mammal. This evolutionary path started with one of the earliest ancestors called “Pakicetus”. A Pakicetus was discovered to be a land animal with four legs that had teeth as carnivores. It skull structure was long, but this organism didn’t look like any marine animal. The scientist then discovered that on the skull’s ear region it was surrounded by a bony wall. This feature on an organism only was distinct from one type of species, scientist discovered that this animal “Pakicetus” was an ancestor of a whale. By comparing the early whales Pakicetus to the next generation of ancestors Ambulocetus, the Ambulocetus whale looks more like

Moon Jellyfish are in the “Animalia Kingdom, Phylum Cnidarian, Class Scyphozoan, Order Semaeostomeae, Family Ulmaridae, and Genus Aurelia” ( Myers, 2016 ; Espinosa, ; 2016 ; Parr, 2016 ; Jones, 2026 ; Hammond, 2016 ; Dewey, 2016). The morphological description of Cnidarians are corals, sea anemones, jellyfish and hydroids. These cnidarians form a diverse phylum that contains ~9000 species, which live in aquatic (predominantly marine) environments. The phylum-defining trait of Cnidaria is the stinging cell, the nematocyte an extrusive organelle used for predation, adhesion and defense (Holstein, 1981; Lengfeld et al., 2009; Tardent and Holstein, 1982) (Steele and Technau; 2011). Also, this phylum, Cnidarians, are divided into two groups, “Anthozoa (sea anemones, corals and sea pens), which live as

The origin of modern day whales, a mystery that has puzzled paleontologists for years, may have just been solved with the discovery of an ankle bone. This discovery might sound simple and unimportant, but the bones of these ancient animals hold many unanswered questions and provide solid proof of origin and behavior. The relationship between whales and other animals has proven to be difficult because whales are warm-blooded, like humans, yet they live in the sea. The fact that they are warm-blooded suggests that they are related to some type of land animal. However, the questions of exactly which animal, and how whales evolved from land to water, have remained unanswered until now.

Attraction between water molecules which allows insects and other objects to float a top the water

Around the mouth of the octopus are eight arms. The eight arms allow the octopus to move, crawl, and swim around in its habitat. Octopuses crawl slowly, walking on its arms to move through the water headfirst with the arms trailing behind. When necessary, octopuses can move fast using their arms to propel it through the water similar to jet propulsion. The suckers found

The concentration of dissolved substances is less in the extracellular fluid than in the cytoplasm. Hypotonic Solution Concentration of dissolved substances (solute) Concentration of water (solvent) What happens to an animal cells? Inside the cell Greater Less Outside the cell Less Greater Membrane

Beginning with the simplest one-celled organism, an extraordinary animal rose in the murky waters entitled to a non-comparable killing-eating machine. This organism has become nature’s most genuine and most successful creature that it has remained unchanged for over 250 million years. Nature finally invented the perfect king of the sea. This animal has given the sea it’s “living” adjective; in turn, it was entitled—the “great white shark.”

There was also a surprising discovery. The fossil of the horseshoe crab is preserved as an exterior and interior mold. The fossil preserved traces of activity by other organisms. The interior mold shows traces left by small invertebrates, that fed on the horseshoe crab after it died. These worms created the mold of the fossil, and the detail was so detailed that the artificial case\t was almost an exact replica. This was very surprising and awesome because this shows how invertebrates can preserve other animals anatomies. The reason for this being: soon after the horseshoe crab died, the worms began to settle upon the horseshoe crab. The worms began building homes, and the tubes took form of the dead horseshoe crab. Because of the rate the worms created their homes, the author predicts the horseshoe

Anatomy is to physiology, as geography is to history; it describes the theatre of events. Medical culture that emphasized the study of anatomy through human vivisection peaked in Alexandria in the 3rd century BC, with Herophilus and Erasistratus- the two primary anatomists of the 3rd century- spearheading this movement. Alexandria was the ideal place to study anatomy and physiology during the Hellenistic period since the research was not tied down by civil laws, taboos, or moralism that prevailed on the Greek mainland. Although the practice of human vivisection was decreed by the priesthood throughout the rest of Egypt and Athens, it was not so in this well-insulated center of learning.

The behavior and movements were similar to a human breaststroke kick. Twice Cooper was observed treading water in the deep end of the pool and then Cooper began swimming from the shallow end to the rope in the deep end. He used a doggy paddle motion with the same breaststroke kick. Cooper kept his head above water as he swam. Many other primates use a doggy style paddle to swim, but Cooper alternated arms each stroke, which is more advanced. He held his head and shoulders out of the water showing more

Cnidarians (or coelenterates), including sea anemones, jellyfish, and corals, are built mostly of sheets of cells, and they exploit the large surface area of the

     Coral animals begin life as free-floating larvae, but settle on the sea floor in sedentary colonies. The term "coral" applies both to these animals and to their skeletons, particularly the skeletons of stone-like corals (Discover 1997).