What is the “water flea?”
The most scientific name for this little water flea is called the Daphnia, a very small planktonic crustacean that measures up to five millimeters long. Daphnia are part of the Cladocera family, which are small crustaceans of all sorts commonly called water fleas. The Daphnia are called water fleas because the movements they make are very similar to the way fleas move around. Daphnias “inhabit most types of standing fresh water except for extreme habitats, such as hot springs.” Many of these creatures live as filter feeders but some can be found clinging onto water plants or skimming the very bottom of the shallow pond.
Why save Daphnia?
Although the Daphnia are very small and seem pointless if they no longer exist, they serve as two important roles to life.
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Although we do not eat them directly, as humans we eat other animals that do such as the Largemouth Bass, which eat Daphnia when it is young. “Daphnia are very important because they take nutrients from algae into their bodies and pass those nutrients on to their predators. As other predators eat the fish or other animals which ate the Daphnia, the nutrients get passed on again.”
Reason Two: Daphnia are also an able to be used in bioassays because they are very sensitive to any changes within the water and a very simple and cheap. They mature in a very short period of time, so it does not take long to grow them to maturity and test. ”Bioassays are procedures that can determine the concentration, purity, or biological activity of a substance such as vitamin, hormone, or plant growth factor by measuring the effect on an organism, tissue, cells, enzyme, or
The Persian invasions of 470 – 479BC saw the Battle of Thermopylae, The Battle of Artemisium, The Battle of Salamis, The Battle of Plataea and The Battle of Mycale. These battles also saw the contributions of many key individuals, which lead to the victory of the Greeks in the ends as well as the rise of the Greek navy.
The Daphnia magna species in this experiment were kept and preserved in jars of suitable water that acted as small ponds. Each Daphnia Magna was transported individually using a wide-mouthed pipette to a depression slide. The stability of the Daphnia Magna on the slide was attained by using a drop of pond water that acted as a boundary of movement for the Daphnia on the depression slide, small pieces of cotton wool were also used to act as an extra boundary to stop the Daphnia Magna from swimming in circles in the pond drop it was placed in; the stability factor was important in counting the heart beat rate more accurately. The depression slide was then placed under the stereomicroscope, over a cooling chamber that was used to slow down the
To begin the lab, the variable treatment was prepared as the Loggerlite probe, used to later measure oxygen consumption, warmed up for approximately 10 minutes. To prepare the variable treatment, 200ml of Sodium and Ammo-lock water was measured in a container and a pre-prepared “tea bag” of tobacco was steeped in the room temperature treated water until a light yellow color was visible. After preparing the tobacco solution the preparation for the live goldfish began as two beakers were filled with 100 ml of treated water. Each beaker was weighed before addi...
The use of model organisms in pre clinical trial is relied upon for the collection of safety and efficacy data prior to first in human clinical studies. The crustacean Daphnia magna is one model organism, whose heart rate is reported to react similarly to the human heart rate, when exposed to identical compounds (3).
Copepods are a group of small crustaceans found in the sea and nearly every freshwater habitat. Some species are like plankton (drifting in seawater), some are living on the ocean floor and some particular species may live in still-water habitats and other wet terrestrial places, such as swamps, under leaf fall in wet forests, bogs, springs, ponds, and puddles, damp moss, or phytotelmata of plants.
The “water bear” is a common name for a group of a little over 100 genera of protozoans grouped under the Phylum Tardigrada and is a relative of the Phylum Arthropoda. The phylum Tardigrada contains over 1000 species, and is grouped into three classes. There are two main classes the Heterotarigrada ad the Eutardigrada. The last is the Mesotardigrada and contains only one species, that was discovered in a sulfur spring in Japan 1937, and has not been seen since. “Water bears” are, as with most species, separated into groups by characteristics and more recently molecular genetic methods. The Heterotarigrada are known mainly for their hair like tufts on appendages and hard-undivided flattened scales. The Eutardigrada are known as “naked tardigrades” because they lack the hard scales or have several separate plates. Tardigrades are then divide further into orders by comparing groups for cuticle appearance, feeding tube, claws, and other defining features (Michalczyk, 2014).
In The Oresteia, Aeschylus encourages the importance of the male role in society over that of the female. The entire trilogy can be seen as a subtle assertion of the superiority of men over women. Yet, the women create the real interest in the plays. Their characters are the incentive that makes everything occur. The characters of Clytaemnestra, Cassandra, and the goddess Athena can demonstrate this.
There are three major shifts in ancient Greek sculptural development such as Archaic, Classical, and Hellenistic. Each major shift is unique and has its own characteristics based on how Greeks perceived their natural and supernatural surroundings.
In modern day society, female gender roles are defined in several of forms; ranging from the stereotypical concept of women being primary caretakers to women being the dominant sex. After analyzing two sources of past literature, two iconic women represent personas of both social standings. In the literary works “Genesis” of The Hebrew Bible; along with, “Lysistrata” by Aristophanes, impactful phenomenons take place in the era of these women.
Through this research paper, I will explore Memphis and its necropolis- the Pyramids Fields from Giza to Dahsur, for its significance in world heritage. According to United Nations Educational, Scientific and Cultural Organization, better known as UNESCO, Memephis and its Necropolis is a site that is part of the UNESCO’s World Heritage list.
Dak Prescott and Jared Goff are two of the most anticipated rookies coming into the 2016 season, and both seem to be making a lot of attention with their two teams. Dak Prescott was drafted by the Dallas Cowboys in the 2016 NFL Draft with the 135th overall pick. Jared Goff, on the other hand; was the 1st overall pick. Dak Prescott was meant to be a player that could be used in the future; Tony Romo was meant to be the presumptive starting QB, but he is predicted to miss 6 – 10 weeks with a broken bone in his back, so Prescott will fill in for him. Dak Prescott is now scheduled to be the starting QB in the Cowboys first regular season game against the New York Giants. A lot of people anticipated that Goff would start for the Los Angeles Ram
Ancient Greek culture first emerged around 1600 B.C. in Mycenae. This developed a powerful military and participated in a wide trading network. Over the next thousand years, Greek society organized itself into city-states. The most famous ones were Athens and Sparta. They served as centers of political, religious, and cultural life.
The book of Zephaniah contains messages of divine judgment against Judah and Jerusalem, as well as against other nations. It addresses a rare concentration of references to central issues in the history of ancient Israel. Idolatry, violence, and deception abound in Judah when Zephaniah began prophesying. Zephaniah's prophesying made it clear that Yahweh would execute vengeance upon unrepentant wrongdoers. His adverse judgments would be visited not only upon Judah and Jerusalem, but also upon other peoples: the Philistines, Ammonites, Moabites, Ethiopians, and Assyrians. Significantly, Zephaniah, the prophet, never stands at the center of the book of Zephaniah; the word of Yahweh is at the center of the book. Zephaniah is mentioned only insofar as he is necessary for the interpretation of the text.
The site of Abydos is an outstanding example of Egyptian religious practices and culture. The site has many examples that exhibit its importance as a center for cult practices and religious beliefs in ancient Egypt. Abydos was home to great concentrations of people but it influenced many more than those that actually lived there. Abydos was never a center for political power but for a large part of the dynastic period in Egypt is was a significant area for its funerary and religious practices. Perhaps the most interesting of those influences were those surrounding Egyptian belief about the afterlife.