Multicellular organism

For oxygen explanation, it is known that the metabolism of all multicellular creatures function with help of oxygen. When the O2 level is down the metabolism rate is low, and in its absence, no animal can live. It is possible that photosynthesis could have triggered a rise in oxygen in the atmosphere and the oceans at the start of the Cambrian, thus permitting a huge evolution of complex animals which possessed circulatory and respiratory mechanisms. It is possible that increased levels of oxygen sped up large Ediacaran metazoans before the explosion. Environmental explanations reveal that prior to evolution of complex animals on earth, there must have been an ideal environment to support their survival. The strongest of all the favorable environmental conditions for the evolution that scientist have identified is the high rate of oxygen when the glacial period ended. Glaciation is another environmental justification of the explosion happening. "Snowball Earth" hypothesis states that before the Cambrian explosion, the whole universe was covered with ice. Glaciers restricted evolution functions in the sea, like blocking rays of the sun from penetrating the waters yet algae and cyanobacterial mats rely on it. When retreatment of glaciers happened, a change of life was earned for many organisms. Particulary, the post post-glacial period proved vital for evolution, as it is said that huge complex multicellular organisms appeared when the temperatures were rising proving that the…

[ Classification ] Sept. 26th Introduction: Classification systems provide a logical way to organize and name living organism, based on the fact that some organisms resemble one another while others do not. There are currently two classification systems of organisms, into 5 kingdoms or 3 domains, both are distinguished by specific characteristics. Kingdom Monera have no well defined internals as they lack membrane to bound organelles, and Protists are single celled organisms that may be plant…

growth, development, and homeostasis in multicellular organisms. The programmed cell death process consists of the cell’s cytoplasm condensing and within an hour getting phagocytized by the neighbouring cell. Throughout the whole process, the cell’s membrane is still intact and this prevents the contents of the cell from getting released into the tissue. The origin of apoptosis is one that has been linked very closely to the origin of multicellularity in eukaryotes. However, the cell death…

This indicates that the blue green algae is more evolved because it takes advantage of the energy that comes from the sun and uses photosynthesis to create food for itself. Next would be the vorticella. Vorticella is in the Eukarya domain and the Protista kingdom, and it is autotrophic. The vorticella is a unicellular organism that usually anchors itself to small particles of material with its stalk but can also survive its own. The vorticella shows an evolutionary advancement because the…

We learn on the origins of the cell that the theory formulated sais all organisms are composed of cells, and the first living cells was prokaryote and it process the DNA but lack in the nucleus. Fossilized prokaryotes were found in rocks 3.5 billions of years, conditions of the earth were totally different of what it is today, also protocols are cell like structures complete with outer membrane. On the difference between Prokaryotes and Eukaryotes, is that Prokaryotes have smaller cells and…

Ancient Greek debated whether living organisms were composed of endlessly divisible fluid or indivisible subunits. However, this debate was settled and closed with the invention of the microscope which is the required material to understand and observe cells. Let us begin with the ABC’s of the Cell Theory which splits into 3 major parts: All living beings are made up of cells Cells are the basic unit of structure in all organisms All cells come from preexisting cells. To have a deeper…

Nitrogen. The organization of these molecules into cells is one feature that distinguishes living things from all other matter. The cell is the smallest unit of matter that can carry on all the processes of life. The three principles define cell theory: 1. All living things are composed of one or more cells. 2. Cells are the basic units of structure and function in an organism. 3. Cells come only from the replication of existing cells. Most cells are small Prokaryotic: 1-10 µm Eukaryotic: 10 -…

Characteristics can classify organisms into 5 key groups called the 5 kingdoms: - Protoctista: These are mainly unicellular organisms that also have a nucleus. Some examples of protoctista are paramecium, amoeba and unicellular algae. -Prokaryotes: These are also unicellular organisms like protoctista but unlike them, they do not have a nucleus. An example of a Prokaryote is bacteria. Some prokaryotes are able to make their own food which makes them more self-sufficient. These types of…

DNA molecules to replicate. After all this is completed then this allows the scientist to construct the DNA profiling. (Simon, Dickey, & Reece, 2013) Population evolution is the consistent changes in the heritable traits of the population’s organism over generations, also, known as natural selection. Population is a group of the same species living in the same environment. Evolutionary adaptation is where a population increases in traits to adapt to their environment. For instance, lizards…

To Be...or Not to Be...Alive or Not The green furry object is alive, because it has all of the 6 characteristics of living things. First of all, the object has cellular organization. The object is a unicellular organism. The one cell must do the functions of the cells in a multicellular organism. Additionally, the object has the chemicals of life. It has the elements in CHON, carbon, hydrogen, oxygen, and nitrogen. It also has carbohydrates, proteins, lipids, and nucleic acid. The object…