Tardigrades: Living or nonliving? Tardigrades: the durable wonder of the animal kingdom. These nearly indestructible, microscopic organisms can be found just about anywhere in the world either in water or on moss and lichen plantation(1) Even though tardigrades prefer to live in a moist environment or on the surface of plants, they are not picky. Tardigrades are able to survive in the vacuum of space of space as well temperatures ranging from -200°C to 151°C.(2). There have been over 1,000 described species since this organism was discovered back in 1773 and there are more being discovered all the time.(3) The question is, are tardigrades living or nonliving? The first question that must be answered in order to answer the bigger question at hand is ‘do tardigrades grow and develop’? Tardigrades are different then most other organisms. Instead of growing through cell division, the cells of a tardigrade just grow in size. Tardigrades usually start out at a size of .5 mm, but they are able to grow to about 1 mm. (4) So, yes, tardigrades …show more content…
Since there are so many tardigrades in the world, they have to be reproducing somehow. Most tardigrades reproduce sexualy. The female will lay her eggs when she molts. The male will come along and inject his sperm into the egg.(6) In some species of their are actually no males. The female still lays her eggs the same way as any other species of tardigrade, but the eggs go through a process called parthenogenesis (4) where eggs double and divide their genetic material and then the two sets of identical chromosomes, compared, to sexual reproduction where the egg has one set of chromosomes and the sperm has another set(5). So tardigrades grow and reproduce, but are they alive? There are still four questions to ask before an answer can be arrived
The next organism you discover is about 1 micrometer in length, lacks a nucleus, and contains chlorophyll. Describe and defend two possible Linnaean classifications and two group classifications for this organism. (5 pts)
Pill bugs, Armadillidium vulgare, are terrestrial isopods [Gibbs, Smigel, 2008]. Thus, they are not very well adapted to land [Gibbs, Smigel, 2008]. Water loss is a reoccurring theme because terrestrial isopods lack “cuticular lipids and the elaborate spiracular apparatus of insects” [Gibbs, Smigel, 2008]. Most of the water loss is evaporation from the respiratory organs [Gibbs, Smigel, 2008]. The respiratory organs are called pleopods, and are gill-like organs “located on the ventral abdominal segments” [Gibbs, Smigel, 2008]. Interestingly, pill bugs are capable of conglobation, the ability to roll up in a ball [Gibbs, Smigel, 2008]. In addition to protection from predation, conglobation may also conserve water [Gibbs, Smigel, 2008].
All living things respond to stimuli, including animals. In our experiment, we tested how roly-polies, or pill bugs, respond to two types of material: wet sand and wet dirt. Pill bugs are isopods, a group of 10,000 species living on land and in fresh water and ocean. They are under the phylum Arthropoda, class Crustacea, containing both crabs and shrimp. Pill bugs generally live in dark, moist environments with the decaying matter they eat.
Unlike other isopods, A. vulgare locomotor activity is presence in the morning and the species exhibit positive phototaxis when temperature increase (Cloudsley-Thompson 1952). Cloudsley-Thompson (1952) also found that response to light is greater when the species have been in the darkness. Refinetti (2000) found
These creatures prefer to live in where it is damp and dark, typically under logs, leaf piles and
Mary Dunford lives in Bridgewater Massachusetts and attended Cardinal Spellman High School is Brockton Massachusetts. Mary’s drive from her house to her high school was about 30 minutes. She was involved in many different sports, clubs, and activities during her years in High School. There were about 180 people in her graduating class who she was extremely close with.
Horseshoe crabs are considered “living fossils” or evolutionary survivors because the external appearance barely changed in over 150 million years. The horseshoe crab is part of the arthropods, which include organisms such as spiders and scorpions. The horseshoe crab is made up of the prosoma, which is the head, opisthosoma, which represents the central part of the body and the telson, which is the tail. The tail is harmless and is only used to help the crab flip itself over if it’s turned over on the wrong side. Horseshoe crabs have been researched numerous times. Findings include their, ancestry, survival, morphological changes (if any) and phylogenetic research among the different variations of horseshoe crabs.
They are predators; mostly carnivores that feed on fish, squid, molluscs, crustaceans and marine animals; some are herbivores that feed on plankton. They can also be filter-feeders or scavengers.
It’s fall verging on winter and it’s cold outside. Well, in Texas it’s cold outside, then hot outside, then cold outside. But it’s still fall verging on winter and you might think that means that termites are taking a break from their spring and summer full-frontal assault on your beautiful home. You’d be wrong. Every expert in pest control in Southlake TX will tell you that termites never sleep. They never go on vacation. And because they’re inside your home for the winter, they never freeze either. So, what do they do? They eat.
The purpose of this study is to identify four unknown organisms. The unknown organisms have been assigned randomly to six-research groups by Professor Hoffman. Each research group was provided two eukaryotes and two prokaryotes. The unknown organisms will fall into the following classifications: bacteria, algae, fungi, or protozoans. All living organisms are organized into one of three domains of life, Bacteria, Archaea, and Eukarya.
There are a few reasons why some Termites became more successful than others. Some of the Termites grew up in a community with strong morals and goals. This made them more likely to achieve a higher level of education. But some Termites lived with complicated families, moving from town to town, and may have not been in the best financial state to pursue a higher education. Other Termites were unable to succeed in college due to the distractions of their own health. Not every Termite grew up in a world where they could obtain the medication or help they needed. All of these past experiences make you the person you are today, but not necessarily ensuring a bright future at a university like Bowling Green State University.
Tardigens are usually the first living creatures on new lands, even though humans claim all the glories Tardigrades are actually the first to land on the new land even if its a harsh land. They can live in as cold as minus 328 degrees Fahrenheit or highs of more than 300 degrees F (148.9 C), according to Smithsonian magazine. Not even radiation, boiling liquids, massive amounts of pressure of us to six times the pressure of the deepest part of the ocean and even the vacuum of space without any protection can harm the (for a good 10 days at least). Even though tardigrades can live just about anywhere they prefer to live in moist environments such as lakes, moss,
Cleopatra VII, the Egyptian queen, is one of the most recognizable figures in history. She ruled Egypt for twenty one years a generation before the birth of Chris. At the height of her power, she controlled virtually the entire eastern Mediterranean coast, and for a fleeting moment she held the fate of the Western world in her hands. Even when a time when female rulers weren’t rare, Cleopatra stood out. She was the only woman of her world to rule alone (Rehabilitating Cleopatra P. 1).
Positive theories explain and predict the behaviour of users of accounting information: i)Reactions of investors to accounting information
Frogs, toads, caecilians, and salamanders are the members of the class Amphibian (amphi- meaning “on both sides” and bios- meaning “life”). These members always require water for reproduction. Most Amphibians undergo metamorphosis, which is a usually degenerative pathological change in the structure of a particular body tissue. And, in the case of Amphibians, it is the changing of a tadpole into