How do species and communities evolve? Does evolution significantly influence the structure of the future community and population structure? 2. What is adaptation? How do organisms adapt in a pressing environmental situation? 3. Are natural resource have effect on the species composition, structure, and function. 4. Why speciation happens? How speciation affects biological diversity. 5. […]
Select and describe an environmental issue within one of those larger areas (e.g. acid rain within pollution). Then, describe what we should do to correct the issue. Consider how long your solution will take, how long we should spend on the issue, how much it will cost both directly and indirectly, and why it is an important issue to […]
A car washing and lubricating (also doing repair and maintenance activities) company which is located close to an estuary ecosystem has been operating for several years (more than 10 yr) in a terrain with the following characteristics: porous, filterable with a freatic level near to the surface (1.5 m depth). This estuary ecosystem is quite […]
Antimicrobial resistance is one of the greatest challenges facing humanity today. Describe how resistance to an antimicrobial agent initially arises, and then persists in a population. Next, consider how environments harbouring a large number of different microbes, like wastewater treatment plants, or the gut microbiome, can be considered hot spots for the spread of antimicrobial […]
Several theories on the evolution of modern eukaryotes have been proposed. Based on what is currently known, describe how modern plants evolved from the initial evolution of the eukaryotic lineage to their modern form. Include the distinct steps that were required, the organisms involved at each step and the evidence that exists to support this.
You are studying the effects of three new neuropeptide drugs in culture. You find that drug A causes a short term increase in a K+ current. Drug B causes a short-term increase in a Cl– current. Adding drugs A and B together results in a long-term increase in the number of Ca++ channels in addition to the effect […]
Consider the energy systems an 800m track athlete would use during a race. In a scenario where the runner has completed an adequate warm-up, their aerobic system is heightened and meeting the energy demands they’re putting on their body, prior to beginning the race. During the first 400m of the race, they feel strong and […]
Conventional activated sludge is a common method used for secondary treatment of wastewater that can remove both carbon and nitrogen from wastewater by switching between oxic (aerobic) and anoxic (anaerobic) conditions. Describe the metabolic processes that are used in conventional activated sludge including the electron donors and acceptors, and the groups of organisms involved. Improving […]
Normal A No Spacing Heading 1 Title Paragraph Styles Facts #2 Mo has a very bad attendance record. Most weeks he only works 4 days out of 5. Last year he missed a total of 48 days of work on 36 different occasions (sometimes he missed more than 1 day at a time). Usually Mo […]
The cancer stem cell (CSC) theory suggests that cancer stem cells (CSCs) exist within a tumor. CSCs do not proliferate at a high rate, so are not targeted by conventional chemotherapies which target rapidly proliferating cells, and CSCs can replenish a tumor via asymmetric cell divisions. True or False
