6. Sketch the polyp form of a cnidarian and add these labels: gastrovascular cavity, mouth/anus, epidermis, gastrodermis, tentacle, mesoglea, and gastrovascular cavity.…
a Bio 20 Final Review SA Phylum | Example | Characteristics | /36 | | | Porifera | Glass Sponge | No true tissue, use collar cells No movement as adult | Cnidaria | Jellyfish | Polyp or Medusa Nerve net | Platyhelminthes | Fluke | Nerve cells that act as a brain Live in bodies | Nematoda | Hookworm | Taper at both ends False coelom, parasitic | Annelida | Earthworm or Leech | Segmentation Hydro skeleton | Mollusca | Octopus or Clam | Mantle, Gills, True coelom Muscular foot, Adductor | Arthropoda | Lobster, Spider or Ants | Jointed appendages Molting , Metamorphosis | Echnodermata | Sea star or sand dollar | Spiny skin Regenerate lost/damaged parts | Chordata | Whale or Human | Notochord/backbone Tail, Dorsal nerve chord | Animal Phylum Class | Example | Characteristics | //28 | | | Agnatha | Lamprey | No JawsParasitic | Chondrichthyes | Hammerhead shark | No swim bladderPelvic fins and gill slits |…
I chose to look up a diagram on a sea dwelling organism known as a Jellyfish. Jellyfish have many different forms and are often characterized in different groups. One jellyfish that stood out to me was the Aurelia or also known as the Moon Jellyfish, which is like the basic jellyfish that I’ve always seen in pictures and books growing up. Jellyfish are said to be very effective predators, as one point in the time they were considered to be at the top of food chain. Being effective predators makes them physically fit to be in any environment that they travel to. Even though most would say that jellyfish are horrible swimmers, they are actually in fact many are very strong precise swimmers. Jellyfish can swim horizontally and vertically by using contraction against their bell to expel jets of water to propel them. One drawback of them not being stronger swimmers like larger fish is that they often get caught in sea currents and get stuck in them as they go pass. The bell that propels them has a thick ring of strong muscle, called the coronal muscle. That muscle generates most of the power and energy used by a jellyfish. Now hanging from their subumbrellar is a projection called the manubrim which has the mouth its terminus. The mouth is often surrounded by oral arms normally just for but can sometimes be a multiple of four such as eight, depending on the type of species. Jellyfish don’t have a brain but they do bear a sophisticated computer which tends to all its needs and functions throughout the jellyfishes body. Though not as complex as a normal brain, it does suit the jellyfish well. Now on the edge of the underside of the jellyfish’s bell are its tentacles. The tentacles too can range in different numbers and sometimes some have thousands. These tentacles can be used to feed it, but also are use as it self defense mechanism to protect and also to hunt. The body and tentacles of a jellyfish can discharge…
The Pacific sea nettle has a reddish-brown bell that can grow up to one foot in diameter. The bell is the body of the jellyfish. Like all jellyfish, the Pacific sea nettle has an ectoderm, and an endoderm. The ectoderm is the outer…
The Portuguese-man-of-war (Physalia physalis) , a marine organism belonging to the order Siphonophae (Potin and Cruickshank; 2012), is found in tropical and subtropical bodies of water—such as the Atlantic and Caribbean oceans (Tamkun and Hessinger;1981). A key adaptation that ensures its survival in the ocean, is the venom located in the organism’s nematocysts. Once provoked, the cnidocytes will inject the toxic nematocysts into the prey or predator nearby (Edwards and Hessinger; 2000). This venom is considered be extremely hazardous that harmful to both human and animal systems and is the cause of death in a number of cases (Tamkun and Hessinger;1981). With this adaptation,…
Phylum: Echinodermata-starfish/sea urchins/sand dollars/sea cucumbers—Deuterostome development BilateralRadial, Endoskeleton, water vascular system. Phylum: Chordata- Non-vertebrate chordate(no skull) and vertebrate chordate(have skull). General chordate features: (1) The Notochord (2) Dorsal nerve cord (3) Post anal tail General vertebrate chordate features:(1) Skull (2) vertebral column (3) Internal organs(multiple endocrine glands) (4) Internal endoskeleton, framework of cartilage or bone, (5) Neural crest-(gill arches/sensory ganglia/schwann cells/ Adrenal gland).…
Lumbriculus variegatus, or blackworms, are part of the segmented worms called annelids. The body is organized into repeated segments. It has a closed circulatory system, similar to humans because the blood is contained within blood vessels. Two major blood vessels, the ventral and dorsal vessels, run straight from the head to the tail, and several vessels connect the two in the anterior segments. The dorsal blood vessel acts similar to the heart, pumping the blood through wavelike contractions of its muscular walls. Blackworms have bright, red blood because of the presence of a hemoglobin-like pigment, erythrocruorin, which transports oxygen. Because the body wall of the worm is transparent, the blackworm’s pulse is visible as the dorsal…
Some types of squid use bacteria to produce light, this is called “bioluminescence”. The uses for this are mating, distracting prey and predators, luring prey in and communication.…
The blue band hermit crab ( Pagurus samuelis) is a species of hermit crab it is usually found on the west coast of North America, and the most common hermit crab in California’s coast. It is a small species, with blue bands on its legs. The habitat it lives in its rocky costal short. This is what the name derives from due to its blue stripes. It prefers to live in the shell of the black turban snail. The length of the blue band hermit crab is 40 mm (1.6 in) and a carapace width of up to 19 mm (0.75 in). The carapace is the upper exoskeleton or shell of arthropods such as crustaceans.…
With the appearance of Platyhelminthes, or flat worms, approximately five hundred fifty million years ago, came the evolution of cephalization, a concentration of nerves at the front end of the organism, which allowed for a more focused approach towards finding nourishment and directing the organism's bodies towards safety or a food source. The cephalization of the Platyhelminthes was a branch off of the early jellyfish, which were radial, and not bilaterally symmetrical, which distinguished them from the flatworms. To be bilaterally symmetrical, an animal must have two identical sides of their body down the middle. The radial symmetry possessed by the jellyfish allows for one to draw a line anywhere through the organism and achieve symmetry. This stemmed from their lack of concentration of neural pathways in the head region, which doesn't exist in jellyfish.…
Starfish are among the most familiar of marine invertebrates. They typically have a central disc and five arms, though some species have more than this. The aboral or upper surface may be smooth, granular or spiny, and is covered with overlapping plates. Many species are brightly coloured in various shades of red or orange, while others are blue, grey or brown. Starfish have tube feet operated by a hydraulic system and a mouth at the centre of the oral or lower surface. They have complex life cycles and can reproduce both sexually and asexually. Most can regenerate damaged parts or lost arms and they can shed arms as a means of defence…
Chemistry is everywhere. It is even in the food we eat. Goldfish is a great example of chemistry in food. Pepperidge Farm is the manufacturer of Goldfish and they are located at 595 Westport Ave Norwalk, CT, 06851 United States. Goldfish were discovered in 1962 by a women who went to Switzerland.…
Naval Engineer / Naval Academy Hooyah! Every Navy Shipmate must bow to the sound of that. The Navy, a global force for good, must always be on their feet and alert. When considering a career in the Navy, a person must carefully look into the responsibilities this will entail, the skills one must have to succeed, plus other important aspects such as working conditions, salary, and the future of the job; however, just as important is to best prepare oneself for this profession by attending the Naval Academy. Your task and responsibilities as a civil engineer aka a Navy Seabee, depends on the project and your specialty.…
Even though many people have regrets, you have to realize you can’t hold them in if you want to move on. In “The Isabel Fish” by Julie Orringer Sage and Maddy lost their friend, Isabel, and both siblings have regrets about it. So to cope with their loss they both fight with each other and ever blame each other for Isabel’s death. Even though Maddy and Sage have been fighting for months, once they communicate with each other about their regrets, they are able to put their problems aside because they realized Isabel’s death was not their fault.…
Marine Biology is the scientific study of organisms that are dependent on water. Marine Biology is an interesting topic to many people because of the exotic animals you get to work with. A career in Marine Biology can be dangerous because of the wild animals, but at the same time it can be fun. It takes time, training, and intelligence to succeed in the career.…