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Degree Level Zoology Essays

Question: Discuss the need for osmoregulation in animals. Use specific examples.

Answer: All external environments fluctuate frequently. They can be relatively stable with small stochastic changes, or extremely random. So, no matter in which habitat they live, all organisms have to have the ability to survive in changeable circumstances. This is the fundamental basis of homeostasis, the process of maintaining a relatively constant internal environment. One of the major factors i......(short extract) to download the full answer, please Sign in or Register then make a payment or submit an essay

Question: What are Cytotoxic T Lymphocytes?

Answer: Lymphocytes are one of the five types of white blood cells circulating in the blood. Although they look very similar they are extraordinarily diverse in their functions. The most abundant forms are B and T cells. The B cells are produced and mature in the bone marrow. In comparison the precursors of T cells leave the bone marrow and mature in the Thymus. B and T cells are specific to particular an......(short extract) to download the full answer, please Sign in or Register then make a payment or submit an essay

Question: Compare and contrast the epidemiology and public health significance of three named parasitic animal protists.

Answer: Though often overlooked by the layperson due to their diminutive size, protists are amongst the most abundant organisms on the planet. The term protist encompasses both the animal and plant varieties, as well as some that are hard to categorize as one or the other. Of the 30,000 known animal protists, roughly 30 per cent are parasitic. Some of these protists have only a slight affect on their hos......(short extract) to download the full answer, please Sign in or Register then make a payment or submit an essay

Question: Describe and explain the functions and structure of the cytoskeleton.

Answer: The cytoskeleton is not present in all living cells. The cytoskeleton is unique to eukaryotic cells and is not present in prokaryotes such as bacteria. It is suggested that the cytoskeleton may have been a crucial factor in the evolution of eukaryotic cells. The cytoskeleton is like a scaffold, made up of fibrous proteins in the cytoplasm of a cell. It’s a very dynamic three-dimensional.......(short extract) to download the full answer, please Sign in or Register then make a payment or submit an essay

Question: Investigating the Effect of Canopy Position on the Area of the Sugar Maple, Acer saccharum.

Answer: The controlling, life-supporting element of any plant is its canopy, the outer-most existing layer of foliage and vegetation. The tree canopy, compromised of leaves, fine branches, and twigs, fashions an environment which is able to function in many different, useful ways while being capable to support living organisms. Some of these functions include filtering the pollutants out of the air, dra......(short extract) to download the full answer, please Sign in or Register then make a payment or submit an essay

Question: Discuss the roles of the following in protein synthesis in mammalian cells:- the large and small subunits of the ribosome, mRNA, tRNA, release factors, SRP.

Answer: Genes drive metabolism, growth and differentiation in living cells. They do this by promoting the synthesis of proteins which in turn catalyse many biological reactions. Therefore the synthesis of proteins is one of the most central and basic events in the life of every cell. The process of proteins synthesis is divided into two different parts; transcription and translation. Transcription is p......(short extract) to download the full answer, please Sign in or Register then make a payment or submit an essay

Question: ‘How do animal communication systems differ from humans? Can primates acquire language?’

Answer: Language has always been considered a uniquely human characteristic form of communication; ‘mans most important cultural invention, the quintessential example of his capacity to use symbols, and a biologically unprecedented event irrevocably separating him from other animals.’ (Pinker 1955) The absence of language is a reflection of what information must be transferred with in the species; con......(short extract) to download the full answer, please Sign in or Register then make a payment or submit an essay

Question: “The concept of algae as a taxonomic group has changed significantly overtime, continues to change and has probably ceased to be useful.” Discuss.

Answer: Algae is the name given to a set of organisms, which are photosynthetic, and they are considered neither animal, plant nor fungi. Algae are predominantly single celled organisms; however some species are multicellular. Taxonomy is a classification of organisms into groups based on similarities of structure or origin. They are several organisms that can be listed under the taxonomic group of ......(short extract) to download the full answer, please Sign in or Register then make a payment or submit an essay

Question: The structure and function of membranes, with reference to membrane constituents and different types of membrane.

Answer: Membranes are essential for the compartmentalisation of a cell and therefore it is clear that the cell would struggle to develop any complexity without them. Although there are many different uses for membranes, especially in the eukaryotic cell, they serve a very important energetic purpose. For instance, they can retain a concentration gradient of, for example, Hydrogen ion, which means that the......(short extract) to download the full answer, please Sign in or Register then make a payment or submit an essay

Question: Compare the processes of osmoregulation and nitrogenous excretion between insects and mammals.

Answer: Due to the unforgiving nature of the natural environment, animals have had to develop ways to survive in many different climatic conditions. These evolutionary transformations have given rise to a variety of ways in which animals attempt to maintain homeostasis. Two major means of achieving this is through osmoregulation and nitrogenous excretion.......(short extract) to download the full answer, please Sign in or Register then make a payment or submit an essay

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