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Botany

Question: Thermal Regulation in the Human Organism.

Answer: Ecology is the branch of biology that deals with the relations between living organisms and their environments. Today, it is widely recognized that an organism is at the center of an ecosystem. As such, it is influenced by a multitude of physical and biological environmental factors. It is the essence of living things to be part of an ecosystem and yet to be capable of resisting, to some extent, t......(short extract) to download the full answer, please Sign in or Register then make a payment or submit an essay

Question: Discuss the importance of human activities in maintaining the biodiversity of semi-natural ecosystems. Include the importance of man-made habitats in promoting biodiversity.

Answer: Humans play an important role in maintaining the biodiversity of semi-natural habitats. Such areas are managed to prevent succession, conserve rare species and try to improve species richness. This conservation is putting to good use the country resources for amenity and recreation. Semi-natural ecosystems have many important values, including economic, environmental, wildlife, archival and herita......(short extract) to download the full answer, please Sign in or Register then make a payment or submit an essay

Question: Light intensity and rate of photosynthesis in spinach leaves.

Answer: This study was undertaken to determine the relationship between of light intensity and rate of photosynthesis in spinach leaves. Rate of photosynthesis was determined at pH 7, 0.2% NaHCO3, room temperature, and under white light using light intensities of 2200, 4250, 5300, 14400, 20600 lux. The amount of oxygen production was determined after five minutes at each light intensity. Spinach leaf ......(short extract) to download the full answer, please Sign in or Register then make a payment or submit an essay

Question: Cellular Respiration – Fermentation of Corn and Malt Extracts

Answer: The fermentation rates of two extracts, which are ideal for fermentation, were evaluated. Six pairs of test tubes were setup (3 for malt, 3 for corn syrup) in a proper fermentation setup and the carbon dioxide amount was recorded on a 5 minute basis for 30 minutes. It was found that the greater yeast concentration yielded the greater carbon dioxide readings. The control tubes had no yeast in the t......(short extract) to download the full answer, please Sign in or Register then make a payment or submit an essay

Question: Discuss the major factors contributing to current reductions in global biodiversity.

Answer: Biodiversity is the blanket term for the natural biological wealth that underscores human life and well-being. Global biodiversity therefore covers a huge range of factors that occur on a vast spatial and temporal scale, making any assessment of biodiversity loss a complicated matter. The term biodiversity represents a complex interplay of species, genes and ecosystems, all three of which are nece......(short extract) to download the full answer, please Sign in or Register then make a payment or submit an essay

Question: Discuss the adaptations of plants in a salt marsh community.

Answer: Salt marshes are inter-tidal ecosystems, surrounded by land and open to the sea by way of an estuary (Pomeroy & Wiegert 1981). As a result salt marshes are constrained, by silt and saline water, to the type of communities it can sustain (Ranwell 1972). However because of the tidal nature of these ecosystems and the presence of many migratory birds we find some of the the most widley distributed pl......(short extract) to download the full answer, please Sign in or Register then make a payment or submit an essay

Question: Diversity in symbiotic protoctists

Answer: Protoctists are all the unicellular eukaryotes and all the multicellular eukaryotes that are neither plants, animals nor fungi (Ridge, 2001, p29). Symbiosis is a mode of life in which different organisms live in close association that may or may not be beneficial to one or both partners (GLO CD-ROM, Open University) There are two main forms of symbiosis within protoctists: mutualism and parasitis......(short extract) to download the full answer, please Sign in or Register then make a payment or submit an essay

Question: What is GM? How is Genetic Engineering applied to the world? Is it beneficial?

Answer: A deliberate alteration to the gene of a living organisms e.g. animals, plants, or bacteria to change their characteristics, is said to be genetically modified. [2] It involves the combining of genes from different organisms to make a new gene, which would be placed inside the DNA of the species to be manipulated. E.g. a fish gene could be placed into a tomato gene. All organisms have the same ......(short extract) to download the full answer, please Sign in or Register then make a payment or submit an essay

Question: Invertebrate colonisation of leaf packs of different palatability in an upland river.

Answer: Freshwater invertebrates are an extremely diverse group. Communities often consist of hundreds of species (Allan, 1975 and Benk et al, 1984). The group is so diverse due to the unstable nature of the benthic environment. Most of the invertebrates live on the stream bed or in leaf packs (conglomerations of organic matter fixed within the stream) due to the difficulties in free swimming in the hi......(short extract) to download the full answer, please Sign in or Register then make a payment or submit an essay

Question: Describe how the following bacterial species interact with their target host cells:
a) Agrobacterium tumefaciens
b) Vibrio cholerae

Answer: Agrobacterium tumefaciens is a common soil bacterium that causes crown gall disease of a wide range of dicotyledonous (broad-leaved) plants, especially members of the rose family such as apple, pear, peach, cherry, almond, raspberry and roses. Basically, the bacterium transfers part of its DNA to the plant host, and this DNA becomes stably integrated into the plant’s genome, which when expressed......(short extract) to download the full answer, please Sign in or Register then make a payment or submit an essay

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