Biology Excursion Question Using data collected on field trip and two named animals, explain the relationship between the distribution and abundance of these two organisms and the abiotic features of the rock platform. There is a close relationship between the abundance and the distribution of organisms living amongst the long reef platform. Abiotic features such as temperature range, salinity, Ph. levels, turbidity, water availability effect the distribution and abundance of aquatic sea creatures living in the area. Some of the organisms such as Tesseropora Roseas (Barnacles) and Knobbly Winks have different adaptations, which allow them to survive in these harsh conditions.
These organisms that are able to have adaptations that enable their survival in these harsh conditions are known as highly specialised organisms. The greater the degree of specialisation an organism has to a particular set of environmental conditions the more vulnerable that organisms is to changes in those conditions. An example is coral – Corals are highly specialised organism that flourishes in relatively shallow, nutrient deficient waters of the tropics. Any increase in nutrient levels promotes the growth of algae and the destruction of the coral. Proximity to large concentrations of people is another important factor contributing to ecosystem vulnerability.
Parasites are part of a large group of organisms called eukaryotes. They are different from bacteria & viruses because their cells share many features with human cells including a defined nucleus. They are usually larger than bacteria, although some environmentally resistant forms are nearly as small. Some parasites only replicate within a host organism, but some can multiply freely in the environment. Parasites can be made up of one cell, as in the case of Giardia, or many cells, as with parasitic
7. Archaega does not have cell wall but they do compose of peptidoglycan molecules with the exception of methanobacteria who have pseudo peptidoglycan in their cell wall. 8. There are three main types of archaea: the crenarchaeota which are characterized by their ability to tolerate extremes in temperature and acidity. The euryarchaeota which include methane-producers and salt-lovers; and the korarchaeota catch-all group for archaeans about which very little is known.
However, it is not theoretically possible to cool any substance to 0 K. Scientists have made great advancements in achieving temperatures close to absolute zero, where matter exhibits quantum effects such as superconductivity and super fluidity. Superconductivity is a phenomenon occurring in certain materials generally at very low temperatures. It is characterized by exactly zero electrical resistance and the exclusion of the interior magnetic field. The electrical resistivity of a metallic conductor decreases gradually as the temperature is lowered. However, in ordinary conductors such as copper and silver, impurities and other defects impose a lower limit.
Ultra means that is beyond what is considered normal. This is because they can only be seen with an immense magnification. The tiny bodies that live inside each cell are known as organelles. This is because they each have different physical and chemical compositions and carry out their own functions. There is a cell that is called a typical cell.
Post-viewing question Q: What are hydrothermal vents? A: Hydrothermal vents are chimney-like structures on the ocean floor. They spew superheated water full of minerals and nutrients. Segment 3: Classifying Species (8 min.) Description Explore the evidence of diverse animal life in the Burgess Shale, and examine the methods scientists use to classify species.
Bacteria also live in plants, animals, and have flourished in manned space vehicles. There are typically 40 million bacterial cells in a gram of soil and a million bacterial cells in a millilitre of fresh water. Once regarded as plants constituting the class Schizomycetes, bacteria are now classified as prokaryotes. Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Some of the most deadly diseases and devastating epidemics in human history have been caused by bacteria.
1,1 Bacteria are tiny microorganisms that are made up of just one cell that can only be seen from under a microscope. They are the smallest living cells and are only a few micromeres in length that normally exist together in millions. Bacteria come in three different shapes which are Coccus, Bacillus and Spirillum. Bacteria exist everywhere inside and outside of our bodies they are more bacterial cells then human cells. They are also found in radioactive waste, soil, plants, water ect.Some bacteria are completely harmless and help with our digestive system.
(A) The absence of advanced forms of marine flora (B) The reduced assortment of aquatic animals (C) The moderate extent of the geographic area (D) The close proximity of more suitable aquatic habitats Paragraph 1 is marked with an arrow []. The open ocean, termed the pelagic region by oceanographers, consists of all nonlittoral marine areas, and comprises roughly sixty-five percent of the total volume of the world’s oceans. Although the region lacks the biotic density and diversity of the coastal waters, primarily because of the absence of complex forms of vegetation and suitable surfaces for the formation of coral reefs, it is inhabited by a wide variety of species that are able to thrive in this unique